Maps forecast extreme heat wave in the western United States

A significant heat wave is forming over the western U.S., with high pressure preventing precipitation and leading to record temperatures across the region. Cities like Phoenix are expected to experience their earliest 100-degree day on record, with over 600 daily temperature records anticipated through early next week. Extreme heat warnings are in effect for major cities, including San Francisco, Los Angeles, and Las Vegas, urging residents to stay hydrated and avoid strenuous activities outdoors. Heat is known to be the leading weather-related cause of fatalities, raising concerns about safety during this heat wave.

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