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By Amanda Greenwood
Associate News Editor
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Millions of residents across communities in two states have been issued with more extreme heat warnings, as they continue to face a heat wave, bringing record-breaking hot temperatures—which, according to the National Weather Service (NWS), could climb to “near-30 degrees above seasonal normals” in some places.
"Numerous daily and monthly heat records are in jeopardy through at least Sunday," said the NWS.
It also warns that there is “no relief expected for the rest of the week.”
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States Affected by Extreme Heat
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Parts of Arizona and California are expected to face “dangerously hot conditions” through Thursday, lasting through the weekend in most cases.
On Thursday, March 18, the NWS for Los Angeles posted, “This is just the start of a long-duration heat wave,” urging residents and tourists to make a plan on how to keep cool over the next few days.
Arizona
The eastern Cochise county—in areas below 5,000 feet—the upper Gila, San Pedro, and Santa Cruz River Valley, including Altar Valley, are likely to face temperatures reaching up to 95 F from Thursday into Sunday, with the hottest days expected to be on Friday and Saturday.
Western Pima and south-central and southeast Pinal counties, along with the Tucson metro area, and the Tohono O`odham Nation, should prepare for temperatures that could reach 108 F—especially through Friday and Saturday—lasting until Sunday.
The lower elevations of the Grand Canyon, and the Yavapai county valleys and basins could see temperatures soar to 104 F in areas below 4,000 feet until Sunday night. The NWS has warned that people doing the Bright Angel Trail should go no farther than 1.5 miles from the upper trailhead. And, during the day, people should stay out of the canyon, Havasupai gardens, and Bright Angel campgrounds.
Residents across Apache Junction, Gold Canyon, Cave Creek, New River, Dripping Springs, Fountain Hills, East Mesa, New River Mesa, Rio Verde, Salt River, and Superior have been warned that they are facing a “major heat risk,” as temperatures are likely to climb to 107 F from mid-morning Thursday through to Sunday evening.
Parts of south-central and south-west Arizona could reach 109 F, and the northwest and eastern valleys of the Phoenix Metro Area, Buckeye, Avondale, Deer Valley, central and north Phoenix, Glendale, Scottsdale, Paradise Valley, South Mountain, Ahwatukee, southeast Valley, and Queen Creek could get to 108 F from Thursday until Sunday.
California
The San Diego county deserts, Coachella Valley, and areas along the San Gorgonio Pass, near Banning, could get up to 110 F until Saturday night, with temperatures expected to drop into the low to mid-70s overnight, which should provide communities with some temporary relief from the heat.
Temperatures, reaching between 96 F and 104 F, are expected to blast most of the valley, lower mountain, and inland coastal areas of southwest California through Thursday, until Friday night.
Parts of southeast and southern California could get to 109 F through Thursday into Sunday night.
What To Do When Facing Extreme Heat
In extreme heat, the NWS advises people to limit outdoor activities, stay out of the sun—especially during the hottest parts of the day—drink plenty, and never leave pets or children in vehicles, unattended, as temperatures could reach lethal levels in minutes.
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