Fast Facts: Identifying Heat-Related Illnesses

More than hurricanes or tornadoes, heat stress is the top cause of weather-related deaths, according to the World Health Organization (WHO).

“Between 2000-2019 studies show approximately 489,000 heat-related deaths occur each year, with 45 percent of these in Asia and 36 percent in Europe,” the WHO said in a fact sheet.

The heat can get to anyone. Finding shelter from the sun and staying hydrated can make all the difference. But some people are at greater risk for heat-related illnesses, including women who are pregnant, children, and anyone with an underlying illness, including asthma, cardiovascular disease, diabetes, or mental health issues.

So, if you see someone who has been outside in extreme heat, how do you know if they’ve been out there for too long? Johns Hopkins Medicine offers insight into the signs of heat-related illnesses and how to respond.