Tuesday, August 20, 2019

How to avoid heat-related illnesses and deaths

GOODFELLOW AIR FORCE BASE, Texas -- The phrase "heat stress" refers to a group of heat-related illnesses that include heat cramps, heat exhaustion and heat stroke. (U.S. Air Force graphic)

In Boston, we believe warmer is better. Our cravings for warmth are formed in the cold, dark winter nights when the prospect of summer seems impossibly remote. But with temperatures reaching 100°F in July, our winter dreams are becoming a nightmare. And it’s not just Boston. More than half of all Americans endured unsafe heat conditions during July, which was the hottest July ever recorded in US history, according to the Washington Post. Europe fared no better; sweltering temperatures broke records in more than a dozen countries in June (this was the hottest June ever in Europe) and July. Not surprisingly, heat-related illnesses and deaths of people at greater risk from high temperatures rose, too.

What is a heat-related illness?

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Our ability to cool off has limits. When the heat is too strong, our bodies overheat. When that happens, we can get headaches and muscle cramps, and vomit. Severe overheating, when body temperature reaches 104 or higher, can lead to heatstroke that can damage kidneys, brains, and muscles.
Even for people who are healthy, heat can be dangerous and cause heat-related illness. Outdoor workers, athletes — especially football players and young athletes — and women who are pregnant should be especially careful when it’s hot outside.

Who is at greater risk from high temperatures?

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Credit: Ready.Gov/Heat

Heat can be a risk for those who are healthy, but it’s particularly risky for people who have existing health problems. It can even be lethal. Decades of research show that people die during heat waves and that these deaths are not occurring among people who were going to die soon anyway.
We all know someone who is at greater risk from too much heat. The elderly, particularly those with heart failure, kidney disease, and chronic lung disease, and the homeless are at high risk when temperatures soar. Less well known are the others who need to be vigilant when extreme heat hits, including parents of children with asthma and people with diabetes. Anyone taking medicines, such as diuretics, that can affect their body’s ability to sweat or hold onto water may also be more vulnerable.

How can you keep yourself and others safe during heatwaves?

Stay Cool, Stay Hydrated, Stay Informed

More than half the people in the US may have received some form of warning during our most recent heatwave. But research on these mass alerts shows they may not be as effective as we’d like. Many cities, including Boston, take a more targeted approach by offering services to communities at risk. You can keep yourself and others safe by taking these steps:
  • Think about whether your health or the health of your neighbors or loved ones are at risk from the heat. If so, make sure everyone — including you — understands how to stay safe during heatwaves.
  • Sign up for heat alerts. Many cities or town governments have a website where you can sign up to receive text messages to alert you of dangerous heat conditions. Free services, such as iAlert, also can send you alerts. Be aware, though, that the alert may go out at temperatures above what is known to be risky for health.
  • Find out where the cooling centers are in your city. Take advantage of these centers and tell others who might be at risk about them. During heat waves, many cities offer free transportation to these centers. Many cities have websites that can help you find the cooling center nearest you.
  • Drink plenty of water during heatwaves. Avoid too much caffeine and alcohol, which can promote dehydration.

What other steps can you take?

It’s right to focus our immediate actions on protecting people most at risk. But we also need to consider recent heatwaves a sign of things to come. We know climate change has already led to more severe heat waves around the United States. Curbing carbon pollution by taking these actions and others can help prevent more frequent and dangerous heat waves.
We can make our cities greener. The difference in temperature between the hottest and coolest parts of cities can be 20°F or more, because of how much the urban landscape absorbs heat. Planting trees and other plants can make a big difference in reducing heat in cities. Green space doesn’t just keep us cool, it also keeps us healthy. Trees remove air pollutants that can further harm people who are at risk from the heat. Vegetation prevents water runoff. In Boston, runoff from heavy rains this April led to pollution levels in the Charles River that forced cancellation of all summer swimming events. Climate change has increased heavy downpours in New England and around the country. Trees can help make our city more resilient to climate change.
We can work to reduce traffic congestion. This is a growing problem in cities all over the country. Use public transit whenever possible. Carpool. If you buy a car, remember that greater fuel efficiency reduces carbon pollution and other pollutants that damage lungs, hearts, and brains — and lowers monthly costs. Improvements to make public transit accessible, affordable, and reliable help everyone. Find out what’s going on in your community about transit, bike lanes, and pedestrian ways. Please advocate by speaking out at community meetings and voting for improvements through local and state referendums.
We can conserve energy at home. If you are redoing your roof, consider getting a green roof, or at least choose a light-colored roofing material. Many cities and states offer free home energy audits, plus incentives to improve a home’s insulation and replace old appliances with newer, more energy-efficient models.

The post Rising temperatures? How to avoid heat-related illnesses and deaths appeared first on Harvard Health Blog.

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