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Extreme Heat Alerts 55 Million West, Phoenix Near 118°F

8/3/2026

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Summary

Story summary

U.S. officials say a heat wave has placed 55 million people under alerts across the West.
The National Weather Service forecasts Phoenix at 118°F, Las Vegas at 115°F, and ties Phoenix’s Aug 1 record of 116°F.
The service issued extreme heat warnings for Phoenix as the Old Trails fire in Spokane County burned over 2,300 acres, prompting evacuations.
Health officials say extreme heat caused nearly one in 100 emergency visits in Los Angeles County.

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Story summary

U.S. officials say a heat wave has placed 55 million people under alerts across the West.
The National Weather Service forecasts Phoenix at 118°F, Las Vegas at 115°F, and ties Phoenix’s Aug 1 record of 116°F.
The service issued extreme heat warnings for Phoenix as the Old Trails fire in Spokane County burned over 2,300 acres, prompting evacuations.
Health officials say extreme heat caused nearly one in 100 emergency visits in Los Angeles County.