Heat waves worldwide are becoming more frequent and are lasting longer, yet many people brush off the dangers. Here’s how extreme heat affects us—and what to keep in mind to stay safe
Aggression and violence also rise, Anderson has found. It may be that people get irritable when they are uncomfortable, but the link might be more biological, he says. Adrenaline and other chemicals increase in a hot body, which “can lead to more impulsive behavior,” he says. Heat also makes people grouchy. Negative comments on TwitterYet most people brush off the risk.
Including factors beyond the temperature high and humidity level is also important, Shickman says. Health is most seriously impacted when the temperature doesn’t dip enough at night to allow the body to recover before the noon sun bakes it again. “Most of the highest correlations between heat and negative health outcomes happen when you have high nighttime temperatures, not the highest daytime temperatures,” he says.
The Seville experience is proving that increasing heat’s visibility makes a difference. According to the unpublished interim data, people who noticed the social media campaign were more likely to stay indoors, work from home, and drink more water during Heat Wave Zoe than those who didn’t. And they were 15 percent more likely to agree that heat warrants changing behavior.Anyone who spends time in the sun can be affected when the heat rolls in, but some people are especially vulnerable.
Once someone starts overheating, fast action is crucial. Symptoms of heat exhaustion include dizziness, muscle cramps, clammy skin, and weakness, among others. At that point, get to a cooler spot, quickly hydrate with water or, preferably, a beverage with electrolytes, and remove extra clothing preventing sweat’s evaporation. Because a person’s mental status can be altered by heat exhaustion, it’s important to check on those who live alone to be sure they’re not experiencing this, Shickman says.
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