Heat waves like the one that engulfed parts of parts of the South and Midwest and killed more than a dozen people are becoming more common, and experts say the extreme weather events, which claim more lives than hurricanes and tornados, will likely increase in the future.

A heat dome that pressured the Texas power grid and killed 13 people there and another in Louisiana pushed eastward Thursday and was expected to be centered over the mid-South by the weekend. Heat index levels of up to 112 degrees (44 Celsius) were forecast in parts of Florida over the next few days.

Eleven of the heat-related deaths in Texas occurred in Webb County, which includes Laredo. The dead ranged in age from 60 to 80 years old, and many had other health conditions, according to the county medical examiner. The other two fatalities were Florida residents who died while hiking in extreme heat at Big Bend National Park.

Scientists and medical experts say such deaths caused by extreme heat will only increase in the U.S. each summer without more action to combat climate change that has pushed up temperatures, making people especially vulnerable in areas unaccustomed to warm weather.

“Here in Boston we prepare for snowstorms. Now we need to learn how to prepare for heat,” said Dr. Gaurab Basu, a primary care physician and the director of education and policy at the Center for Climate, Health, and the Global Environment at Harvard T.H. Chan School of Public Health.

Planting more trees to increase shade in cities and investing in green technology like heat pumps for home cooling and heating could help, Basu said.

Extreme heat already is the deadliest of all weather events in the United States, including hurricanes, tornadoes, wildfires and flooding.

“Heat waves are the deadliest because they affect such large areas and can go on for days or weeks,” said Joellen Russell, a climate scientist who teaches at the University of Arizona in Tucson and is currently on a Fulbright scholarship in Wellington, New Zealand. “And they catch people by surprise.”

Phoenix, the hottest large city in America, faces an excessive heat warning headed into the weekend. Dangerously hot conditions are forecast from Saturday through Tuesday, including temperatures of 107-115 degrees (41.6-46.1 Celsius) across south-central Arizona.

“Arizona already understands heat to a certain extent, but it’s getting hotter for us, too,” said Russell. “That means a lot of people will continue to die.”

Counting heat deaths has become a science in Arizona’s Maricopa County, which includes metro Phoenix. The county tallied 425 heat-associated deaths last year, a 25% increase over 2021.

Located in the Sonoran Desert, Maricopa County counts not just deaths due to exposure but also deaths in which heat is among several major contributing factors, including heart attacks and strokes.

The county’s Office of the Medical Examiner updates suspected and confirmed heat-associated deaths every week through the warm season, which runs from May through October. So far this season, there have been six heat-associated deaths in Maricopa County, home to nearly 4.5 million people.

Dr. Sameed Khatana, a staff cardiologist at the Philadelphia VA Medical Center and assistant professor at the University of Pennsylvania’s Perelman School of Medicine, said deaths in which heat contributed significantly to fatalities from causes like heart failure should also be considered to provide a more complete picture.

Khatana participated in research published last year that suggested that from 2008 and 2017 between 13,000 to 20,000 adult deaths were linked to extreme heat, about half due to heart disease.

Older people and those with diabetes, obesity, heart disease and other serious health conditions are most at risk, he said.

“Hurricanes, flooding and wildfires are very dramatic,” said Khatana. “Heat is harder to see and especially affects people who are socially isolated or living on the margins.”

The city of Phoenix’s Office of Heat Response and Mitigation has opened summertime shelters for homeless people, operates cooling centers in libraries and other community spaces to help people get out of the sun and distributes bottled water, hats and sunscreen. The city also has a “Cool Callers” program with volunteers dialing vulnerable residents who ask to be checked on during hot periods.

Even the Phoenix Zoo is taking measures to cool off the monkeys, big cats and rhinos, spraying them with water, delivering frozen treats, and providing shaded areas and cooled water pools.

Extreme heat deaths are a global problem.

Mexican health authorities this week said there have been at least 112 heat-related deaths so far this year, acknowledging for the first time the deadliness of a recent heat wave that President Andrés Manuel López Obrador previously dismissed as an invention of alarmists.

The report released Wednesday also shows a significant spike in heat-related fatalities in the last two weeks. So far this year, Mexico’s overall heat-related deaths are almost triple the figures seen in 2022.

A flash study released this spring said record-breaking April temperatures in Spain, Portugal and northern Africa were made 100 times more likely by human-caused climate change.

Deaths and widespread hospitalizations were caused by searing heat wave that broiled parts of southern Asia in April with temperatures of up to 113 degrees (45 Celsius) was made at least 30 times more likely by climate change, according to a rapid study by international scientists.
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In the northern Indian state of Himachal Pradesh, women are crafting products from pine needles as part of an initiative that aims at providing them with livelihood opportunities while reducing the risk of forest fires. Anjana Pasricha reports on one project in the district of Mandi. Video: Rakesh Kumar
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SYDNEY – Australia on Saturday will become one of the first countries to recognize psychedelic drugs as medicines. In February, the Therapeutic Goods Administration, Australia’s medical regulator, sanctioned use of psychedelics for some mental health conditions. Experts agree that psychedelic-assisted therapies in Australia are in their infancy.

Starting Saturday, authorized psychiatrists in Australia will be able to prescribe methylenedioxy methamphetamine – MDMA, the active ingredient in such party drugs as ecstasy or molly — to treat post-traumatic stress disorder.

They will also be allowed to prescribe psilocybin, a compound found in psychotropic “magic” mushrooms, to treat depression that has not responded to other therapies.

Susan Rossell, a cognitive neuropsychologist at Swinburne University in Melbourne, is conducting one of Australia’s biggest clinical trials of psilocybin. Preliminary results show significant improvements in some patients’ mental health while others have shown no signs of getting better.

Rossell told the Australian Broadcasting Corp. that psychedelic therapies research is still in its early stages.

“We have been stuck for very many years in terms of mental health treatments for people with treatment-resistant conditions,” she said. “So, the fact that psychedelic medicines do seem to be working for a number of people is fantastic. However, they are not working for some people as well, and that is where I would note a great deal of caution in this field at the moment.”

The Royal Australian and New Zealand College of Psychiatrists has issued new guidelines for its members’ use of psychedelic drugs. They must only be administered in a hospital or clinic, where two psychotherapists must stay with the patient for six to eight hours to ensure their safety.

The organization has said that with a lack of mental health professionals in Australia, it is likely that few providers will be able to meet these conditions.

Other experts fear that the new regulations that permit the use of MDMA and psilocybin in Australia have been approved too quickly. They believe there is potential for psychedelic substances to provoke anxiety, panic or cause psychological damage to patients.

Australia’s official medical regulator, the Therapeutic Goods Administration, approved the use of psychedelics to treat some mental health conditions in February, making the country one of the first in the world to recognize the drugs as medicines.

In announcing its decision, the regulators said the “benefits to patients and public health … outweigh the risks.”
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ALBUQUERQUE, NEW MEXICO — A team of Italian researchers reached the edge of space Thursday morning, flying aboard Virgin Galactic’s rocket-powered plane as the company prepares for monthly commercial flights.

The flight launched from Spaceport America in the New Mexico desert, with two Italian Air Force officers and an engineer with the National Research Council of Italy focusing on a series of microgravity experiments during their few minutes of weightless.

One wore a special suit that measured biometric data and physiological responses while another conducted tests using sensors to track heart rate, brain function and other metrics while in microgravity. The third studied how certain liquids and solids mix in that very weak gravity.

Virgin Galactic livestreamed the flight on its website, showing the moment when the ship released from its carrier plane and the rocket was ignited. The entire trip took about 90 minutes, with the plane’s touchdown on the runway prompting cheers and claps by Virgin Galactic staff.

With the ship’s copilots, it marked the most Italians in space at the same time. Colonel Walter Villadei, a space engineer with the Italian Air Force, celebrated by unfolding an Italian flag while weightless.

Next up for Virgin Galactic will be the first of hundreds of ticket holders, many who have been waiting years for their chance at weightlessness and to see the curvature of the Earth. Those commercial flights are expected to begin in August and will be scheduled monthly, the space tourism company said.

Virgin Galactic has been working for years to send paying passengers on short space trips and in 2021 finally won the federal government’s approval. The company completed its final test fight in May.

The Italian research flight was initially scheduled for the fall of 2021 but Virgin Galactic at the time said it was forced to push back its timeline due to a potential defect in a component used in its flight control system. Then the company spent months upgrading its rocket ship before resuming testing in early 2023.

After reaching an altitude of nearly 15,000 meters, Virgin Galactic’s space plane is released from a carrier aircraft and drops for a moment before igniting its rocket motor. The rocket shuts off once it reaches space, leaving passengers weight before the ship then glides back to the runway at Spaceport America.

Virgin Galactic has sold about 800 tickets over the past decade, with the initial batch going for $200,000 each. Tickets now cost $450,000 per person.

The company said early fliers have already received their seat assignments.
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LONDON – One of the world’s most common artificial sweeteners is set to be declared a possible carcinogen next month by a leading global health body, according to two sources with knowledge of the process, pitting it against the food industry and regulators.

Aspartame, used in products from Coca-Cola diet sodas to Mars’ Extra chewing gum and some Snapple drinks, will be listed in July as “possibly carcinogenic to humans” for the first time by the International Agency for Research on Cancer (IARC), the World Health Organization’s (WHO) cancer research arm, the sources said.

The IARC ruling, finalized earlier this month after a meeting of the group’s external experts, is intended to assess whether something is a potential hazard or not, based on all the published evidence.

It does not take into account how much of a product a person can safely consume. This advice for individuals comes from a separate WHO expert committee on food additives, known as JECFA (the Joint WHO and Food and Agriculture Organization’s Expert Committee on Food Additives), alongside determinations from national regulators.

However, similar IARC rulings in the past for different substances have raised concerns among consumers about their use, led to lawsuits, and pressured manufacturers to recreate recipes and swap to alternatives. That has led to criticism that the IARC’s assessments can be confusing to the public.

JECFA, the WHO committee on additives, is also reviewing aspartame use this year. Its meeting began at the end of June, and it is due to announce its findings on the same day that the IARC makes public its decision – on July 14.

Since 1981, JECFA has said aspartame is safe to consume within accepted daily limits. For example, an adult weighing 60 kilograms would have to drink between 12 and 36 cans of diet soda – depending on the amount of aspartame in the beverage – every day to be at risk. Its view has been widely shared by national regulators, including in the United States and Europe.

An IARC spokesperson said both the IARC and JECFA committees’ findings were confidential until July, but added they were “complementary,” with IARC’s conclusion representing “the first fundamental step to understand carcinogenicity.” The additives committee “conducts risk assessment, which determines the probability of a specific type of harm (e.g., cancer) to occur under certain conditions and levels of exposure.”

However, industry and regulators fear that holding both processes at around the same time could be confusing, according to letters from U.S. and Japanese regulators seen by Reuters.

“We kindly ask both bodies to coordinate their efforts in reviewing aspartame to avoid any confusion or concerns among the public,” Nozomi Tomita, an official from Japan’s Ministry of Health, Labor and Welfare, wrote in a letter dated March 27 to WHO’s deputy director general, Zsuzsanna Jakab.

The letter, reviewed by Reuters, also called for the conclusions of both bodies to be released on the same day, as is now happening. The Japanese mission in Geneva, where the WHO is based, did not respond to a request for comment.

Debate

The IARC’s rulings can have huge impact. In 2015, its committee concluded that glyphosate is “probably carcinogenic.” Years later, even as other bodies like the European Food Safety Authority (EFSA) contested this assessment, companies were still feeling the effects of the decision. Germany’s Bayer in 2021 lost its third appeal against U.S. court verdicts that awarded damages to customers blaming their cancers on use of its glyphosate-based weedkillers.

The IARC’s decisions have also faced criticism for sparking needless alarm over hard to avoid substances or situations. It has previously put working overnight and consuming red meat into its “probably cancer-causing” class, and using mobile phones as “possibly cancer-causing,” similar to aspartame.

“IARC is not a food safety body, and their review of aspartame is not scientifically comprehensive and is based heavily on widely discredited research,” said Frances Hunt-Wood, the secretary general of the International Sweeteners Association (ISA).

The body, whose members include Mars Wrigley, a Coca-Cola unit and Cargill, said it had “serious concerns with the IARC review, which may mislead consumers.”

Aspartame has been extensively studied for years. Last year, an observational study in France among 100,000 adults showed that people who consumed larger amounts of artificial sweeteners – including aspartame – had a slightly higher cancer risk.

It followed a study from the Ramazzini Institute in Italy in the early 2000s, which reported that some cancers in mice and rats were linked to aspartame.

However, the first study could not prove that aspartame caused the increased cancer risk, and questions have been raised about the methodology of the second study, including by EFSA, which assessed it.

Aspartame is authorized for use globally by regulators who have reviewed all the available evidence, and major food and beverage makers have for decades defended their use of the ingredient. The IARC said it had assessed 1,300 studies in its June review.

Recent recipe tweaks by soft drinks giant Pepsico demonstrate the struggle the industry has when it comes to balancing taste preferences with health concerns. Pepsico removed aspartame from sodas in 2015, bringing it back a year later, only to remove it again in 2020.

Listing aspartame as a possible carcinogen is intended to motivate more research, said the sources close to the IARC, which will help agencies, consumers and manufacturers draw firmer conclusions.

But it will also likely ignite debate once again over the IARC’s role, as well as the safety of sweeteners more generally.

Last month, the WHO published guidelines advising consumers not to use non-sugar sweeteners for weight control. The guidelines caused a furor in the food industry, which argues they can be helpful for consumers wanting to reduce the amount of sugar in their diet. 
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TERRA CEIA ISLAND, FLORIDA — The Florida Health Department has issued a statewide mosquito-borne illness advisory after four locally contracted cases of malaria were reported along the Gulf Coast south of Tampa. 

On Monday, a health alert issued by the federal Centers for Disease Control and Prevention also noted that another case had been detected in Texas, marking the first time there has been a local spread of malaria in the United States in 20 years. 

The four residents in Sarasota County received treatment and have recovered, according to the state’s Health Department advisory. Malaria, caused by a parasite that spreads through bites from Anopheles mosquitoes, causes fever, chills, sweating, nausea and vomiting, and headaches. It is not spread person to person. 

It’s the threat of the mosquito-borne illness that concerns Kathleen Gibson-Dee, who lives on Terra Ceia Island, which is about 32 kilometers north of Sarasota County. 

Even though no malaria cases have been reported in Manatee County, where Terra Ceia is located, Gibson-Dee said that she’s now routinely using bug repellent while working in her garden. 

“I don’t go out without it,” she told The Associated Press on Tuesday. “And we don’t go out in the evening because you can see clouds and clouds of bugs now. They may not all be mosquitoes, but there’s certainly mosquitos out there.” 

Another resident, Tom Lyons, says news of the malaria cases “makes me take mosquito protection a little more seriously.” 

The mosquito population thrives in Terra Ceia because “it’s an island surrounded by a lot of shallow water and mangroves, and ideal places for mosquitoes,” Lyons said. 

Stepping up control efforts

Officials in Manatee County have ramped up efforts to control the mosquito population. 

Chris Lesser, director of the Manatee County mosquito control district, said they’re primarily using helicopters to combat the mosquito population because they cover between 6,070 to 8,082 hectares in one night. A truck can only cover around 404 hectares a night, he said. 

“We really want to focus on killing the adult mosquito before they have the opportunity to feed on one person that may be infected with malaria and then transmit that disease to a second person,” Lesser said. 

He said the time frame for when a mosquito can become infected to when it can transmit the disease to a person is about 14 days. 

“So, we’re trying to get in there about once every seven to 10 days and really knock down the mosquito population. And that process will continue until the public health alert that we’re currently under is lifted,” Lesser said. 

“It’s a curtain,” he continued. “We’re trying to keep the malaria mosquitos from coming into our county through our southern border by using aggressive mosquito control activities.” 

Officials in Sarasota County area also are using similar tactics to control mosquitos, the county’s health department said in an advisory. 

The initial malaria advisory was issued in Sarasota County after the first case was reported in late May. That was followed by a second case, and then two more, said Jae Williams, the press secretary for the Florida Department of Health. 

“As soon as it crossed over from one to two confirmed cases, it progressed to an alert,” Williams said, comparing it to the system of issuing a hurricane watch versus a hurricane warning — when a storm is imminent. 

“Listen, the conditions are favorable,” Williams continued. “It’s not just some rogue one mosquito. People need to be paying attention.” 

Williams said health officials are being proactive. 

“We know we are going into the Fourth of July holiday. We know the summer’s only getting hotter and wetter over the next couple of months,” Williams said. “So, we just wanted to give Floridians a big kind of heads up, put the whole state on notice.” 

About 2,000 U.S. cases of malaria are diagnosed each year — the vast majority in travelers coming from countries where malaria commonly spreads. 

Since 1992, there have been 11 outbreaks involving malaria from mosquitoes in the U.S. The last one occurred in 2003 in Palm Beach County, Florida, where eight cases were reported.
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South Korea is changing the way it calculates a person’s age. 

Under a new law that takes effect Wednesday, South Korea is adopting the international method that uses a person’s actual date of birth to determine their age.   

Under its traditional method, South Koreans are considered to be one year old at birth, including their months in the womb, and become a year older every January 1 regardless of their actual date of birth. 

The new law that takes effect Wednesday means all South Koreans will officially become a year or two younger.   

Officials say a separate method of calculation that uses the date a person is born and then adds a year each January 1 will remain in effect for compulsory military service, education and the legal drinking age. 

Some information for this report came from Reuters, Agence France-Presse.  
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A dangerous and prolonged heat wave blanketed large parts of the southern United States on Tuesday, buckling highways and forcing people to shelter indoors in what scientists called a climate-change supercharged event. 

Excessive heat warnings were in place from Arizona in the southwest to Alabama in the southeast, with south and central Texas and the Lower Mississippi Valley worst hit, the National Weather Service said. 

Victor Hugo Martinez, a 57-year-old foreman who was leading workers repairing a road in Houston, told AFP: “We can’t keep up with it. It’s too much, we have like 10 or 12 spots like this right now.” 

The crew wrapped bandanas around their heads to protect themselves from the blazing heat, with Martinez explaining they made sure to drink plenty of water and take several breaks to protect their health. 

The National Weather Service meanwhile urged Americans in across the South to drink water, stay indoors, and check on vulnerable friends and relatives. 

Andrew Pershing, a scientist with Climate Central, told AFP the “really unusual thing about this event is how big it is, and how long it has lasted.” 

“There have been places in Texas that have had more than two weeks of over 100 degrees Fahrenheit, which are just really unusual temperatures for this time of year even in a region that is used to heat.” 

Extreme weather more likely

Accumulated historic greenhouse emissions made the extreme weather event at least five times more likely than otherwise, according to preliminary calculations by a team led by Pershing. 

The sweltering conditions are expected to expand throughout the South beginning Wednesday and continue into the long July 4 holiday weekend.  

The extreme heat appears to have claimed some lives. 

Last week, a 66-year-old postal worker in Dallas fainted while delivering mail as the heat index hovered around 115 F. He died hours later, the U.S. Postal Service told the media, though the cause of death is still being investigated. 

And on Friday, a 14-year-old boy collapsed from exhaustion while hiking in Big Bend National Park in Texas and later died, according to an official statement. 

His stepfather left the scene to hike back to their vehicle to find help while the teen’s brother attempted to carry him back to the trailhead. The father was later found dead in a car crash. 

Power grid strained

The strain is sure to put the power grid in Texas to the test, as millions of people switch on their air conditioners to cope, with demand peaking around late afternoon. 

ERCOT, the state utility operator, has issued a Weather Watch, calling on individuals and institutions to voluntarily save energy to avoid an emergency, and has so far been able to cope, thanks in part to an increasing contribution from solar power in recent years. 

Public cooling centers run by local authorities or the Red Cross are available for vulnerable people. 

Animals, too, were suffering. The Houston Humane Society said 12 cats and one dog were found dead in an abandoned apartment. The group was able to rescue six cats from the property. 

Air conditioning can be climate feedback loop

Kristina Dahl, principal climate scientist of the Union of Concerned Scientists said that the widespread use of air conditioning was itself a climate feedback loop. 

“We know that one of the most effective things you can do to prevent heat, illness and death during heat waves is to run the air conditioning,” she told AFP.  “And yet if we are not powering that air conditioning with clean renewable energy sources, we are contributing more carbon emissions to the atmosphere which will further worsen heat which will necessitate greater air conditioning use.” 

Recent years have seen an explosion in litigation aimed at shifting the financial responsibility of climate disasters toward fossil fuel companies.  

Last week, a county in the northwestern state of Oregon filed a lawsuit against major fossil fuel companies seeking more than $51 billion over the 2021 “heat dome,” which blighted Canada and the United States.  

“Communities everywhere are now paying the price for the fossil fuel industry’s decades of climate deception and pollution,” Richard Wiles, president of the Center for Climate Integrity, told AFP.   
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