More than 24 million people are under alert as an intense heat dome drives temperatures to extreme levels across several western United States states. California, Arizona, Nevada, and surrounding regions are expected to experience temperatures well above seasonal averages over the coming days.
Meteorologists explain that a heat dome forms when a large high-pressure system traps hot air over a region for an extended period, preventing cooler weather systems from moving in. As a result, temperatures can remain dangerously high during both the day and the night, increasing health risks for millions of residents.
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Authorities are urging people to limit outdoor activities, stay hydrated, and pay close attention to children, older adults, and individuals with chronic medical conditions, who are especially vulnerable to extreme heat.
Why is a heat dome so dangerous?
Because it can lead to heat exhaustion, dehydration, and potentially life-threatening heatstroke, especially when extreme temperatures persist for several consecutive days.
