Metro Phoenix extreme heat warning extended as dangerous temperatures persist

PHOENIX – A metro Phoenix extreme heat warning has been extended until the end of the week.

The warning, which started Saturday and had been set to expire Monday night, will now remain active at least through Friday night, according to the National Weather Service (NWS).

The extreme heat warning is limited to metro Phoenix on Tuesday, when temperatures are expected to climb above 110 degrees for the fourth consecutive day. But the impacted area will grow as the week progresses.

“Starting tomorrow is when it expands out to more like the rest of Maricopa County, northwest Pinal and even like in the higher terrains of Gila County,” Alicia Ryan of the NWS in Phoenix told KTAR News 92.3 FM on Tuesday morning.

Thursday is expected to be the hottest day of the year so far in Phoenix, with a projected high of 116 degrees. The Valley forecast calls for daily highs of at least 110 degrees until the weekend.

“We look to be starting to cool off starting Saturday, … starting to trend back more toward normal,” Ryan said.

The normal high for the third week of June in Phoenix is 106 degrees.

What trails are closed during Phoenix extreme heat warning?

The following Phoenix hiking trails are restricted from 8 a.m. to 5 p.m. on extreme heat warning days:

• Camelback Mountain: Echo Canyon Trail and Cholla trail.
• Phoenix Mountains Preserve: Piestewa Peak Summit Trail and associated trails.
• South Mountain Park and Preserve: Holbert Trail, Mormon Trail, Hau’Pal Loop Trail and access to the National Trail from the Pima Canyon Trailhead.

The South Mountain trails were added to the city’s restricted list this year.

In another heat-related alteration for this year, the NWS changed its advisory terminology, switching from “excessive” to “extreme” for warnings and watches. But the intention is the same as it was in the past.

An extreme heat watch means the NWS believes dangerous heat is possible, while extreme heat warnings are issued when dangerous heat is happening or imminent.

KTAR News 92.3 FM’s Colton Krolak contributed to this report.

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