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Heat affects health in a number of ways.Heat exhaustion, which can include dizziness, headaches, shaking and thirst, can affect anyone, and is not usually serious, providing the person cools down within 30 minutes.The more serious version is heatstroke, when the body’s core temperature goes above 105 degrees Fahrenheit. It is a medical emergency and can lead to long-term organ damage and death. Symptoms include rapid breathing, confusion or seizures, and nausea.Who is at RiskSome people are more vulnerable, including young babies and older people, as well as people who have to stay active or are more exposed, such as homeless people.DANGEROUS US HEAT WILL CONTINUE AS STORMS SET FOR PLAINS, MID-ATLANTICExisting conditions, including respiratory and cardiovascular diseases, as well as diabetes, can also heighten risk – and be exacerbated by heat.”When you see a hot day such as today, there is likely to be a spike in mortality in all of these disease groups,” said Shakoor Hajat, an environmental epidemiologist at the London School of Hygiene and Tropical Medicine.Globally, just under half a million deaths a year are estimated to be due to excess heat, according to a study last year in The Lancet, although data is lacking from many low-income countries. Far more die of cold, but that is forecast to change, the researchers said.
With heat rising around the globe, it’s important to understand the health risks of extreme heat. Pictured: A woman works at the Community of Madrid Medical Emergency Service call centre during the second heatwave of the year, in Madrid, Spain, on July 14, 2022.
(REUTERS/Isabel Infantes/File Photo)Less Obvious RisksAir pollution also increases during heatwaves, the World Meteorological Association warned last week, with adverse health affects.Heat also can lead to low birth weight and premature birth for pregnant women and babies, a number of studies have shown.There are less obvious risks, too. Lawrence Wainwright, an environment lecturer at the University of Oxford, said suicide rates and mental health problems often rise during heatwaves.Scientists said that there was no evidence yet of any impact on COVID-19 or long COVID patients.Timing MattersExperts say more deaths occur earlier in the summer, when people’s bodies have not had chance to acclimatize.Location matters, too; people are at higher risk in places where they are not used to such heat, including in parts of Europe.WESTERN EUROPE RAVAGED BY WILDFIRES AS HUNDREDS REPORTED DEAD FROM HEAT WAVEHowever, there are limits, and people all around the world are at risk in extremely hot weather caused by climate change, particularly people who have to continue to work in physical jobs, for example.”In all of the places I’ve seen in the world that we have data, there’s an increase in mortality risk when people are exposed to high temperatures,” said Eunice Lo, a climate scientist at the University of Bristol, in western England.What You Can DoA number of European public health agencies have issued advice on keeping cool, including avoiding exertion where possible and staying hydrated.Heatstroke is a medical emergency and requires immediate medical attention.They also advise checking in on the vulnerable. In the European heatwave in 2003, when more than 20,000 people are thought to have died, many of them were older and isolated.
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