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Phoenix heatwave: 110+ degree temps bake the Valley
18 Aug
Summary
- Metro Phoenix temperatures to exceed 110 degrees for a week.
- An extreme heat warning is active from Monday, Aug. 17 to Friday, Aug. 21.
- Overnight lows will remain near 90 degrees, offering little relief.

Metro Phoenix is experiencing a significant heat wave, with temperatures anticipated to consistently reach or surpass 110 degrees throughout the week of August 17-21. An "extreme heat warning" has been issued for central and southern Arizona, highlighting the severity of the conditions. Overnight lows are expected to remain in the 90s, exacerbating the heat risk.
While the forecast initially indicated a predominantly hot and dry week, there is a minor possibility of weather changes. Shifts in the high-pressure system might introduce moisture by Wednesday, August 19, potentially leading to isolated storms and slightly lower temperatures by Thursday, August 20. However, the confidence in these storm chances is currently low, estimated at around 20%.
Residents seeking to stay cool can utilize the Heat Preparedness Network for statewide resources or consult the Maricopa County heat page for localized information. Meteorologist Tevian Whitehurst is covering these extreme weather events for The Arizona Republic and azcentral.com.