Nighttime Extreme Heat Is The Most Dangerous

When the heat index approaches 105 degrees F, as it has in many cities across the northern tier of the United States, people lock themselves indoors with their air conditioners on. Some with AC still swelter, while others work outdoors. The health of many of these individuals is at risk. However, a new study suggests that nighttime heatwaves may be the most hazardous part of the day. 

Inside Climate News has published an article titled “Amid Brutal Heat Wave, Officials Stress Health Risks of Hot Nights.” Its main premise is that “During a heat wave, it is crucial for people to cool down at night to reduce their core body temperature and reduce the physiological burden put on them during long, sizzling days. But a growing body of research shows that hot nights are becoming more common with climate change—and not just during a heat wave.” 

Many places, particularly cities, do not cool down much at night. The temperature may not drop much from daytime hours. And, large buildings and streets store the heat, which is released when the sun goes down.

Challenge For The Homeless

The nighttime heat causes several challenges. Air conditioners need to be run 24 hours a day, which puts pressure on the electricity grid infrastructure, which is already weak in some parts of the US.

There are more dangerous cases of people who do not have air conditioning. Heat may be trapped inside their houses or apartments. And, just as difficult are homeless people who do not even have access to fans. 

As is the case with many global warming issues, nighttime heat has no readily available solutions.

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