A heat dome is set to envelop the central and eastern US, bringing scorching temperatures above 100F to cities from the Great Plains to the mid-Atlantic states. With an estimated 170 to 200 million people expected to be affected, experts are warning residents to stay indoors to avoid the extreme heat, which will persist even at night, with temperatures struggling to drop below 80F in urban areas. Heat domes, a result of high pressure compressing warm air downwards, have become more common in recent years due to global warming.

The dangers of extreme heat are significant, with heat-related illnesses posing a serious risk, especially during the first heatwave of the year when bodies are not acclimated. The US has seen more fatalities from extreme heat than hurricanes and tornadoes in recent years, underscoring the severity of the situation. As temperatures soar and millions are under heat alerts, health experts emphasize the importance of finding ways to stay cool and hydrated.

Some states have taken proactive measures to protect vulnerable populations, such as setting up cooling stations for the unhoused. However, disparities exist in heat protection laws, with only a few states mandating shade and water breaks for outdoor workers. While some areas like Phoenix have implemented regulations ensuring access to air conditioning, others, like Florida, have rolled back heat protections following pressure from business interests.

As the heatwave continues to intensify across the region, the health risks associated with prolonged exposure to extreme temperatures remain a pressing concern. It’s crucial for individuals and communities to take necessary precautions to stay safe and mitigate the impacts of this potentially deadly heatwave.