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US Southwest swelters with temperatures up to 120 degrees

Officials tweeted, “Can’t stress enough that it will become dangerously hot early this week.” (Representational)

An excessive heat warning was issued for a broad swath of the southwestern US on Monday with temperatures expected to approach 120 degrees (almost 49 Celsius) this week in what forecasters say could prove to be the hottest days of the year.

The National Weather Service said southern Arizona will experience temperatures from 112 to 119 degrees (44 to 48 Celsius) through Wednesday. That heat warning extended to parts of Southern California, including desert communities such as El Centro, Palm Springs, Twentynine Palms and Blythe, as well as north to Vegas and other parts of Nevada.

The news prompted the operator of California’s electrical grid to call for voluntary conservation of power Tuesday and Wednesday due to high temperatures in much of the West.

Parts of Utah have also issued an excessive heat warning with temperatures this week expected to approach 109 degrees (43 Celsius). The weather service said the warning for Utah’s Dixie and Lake Powell regions will be in effect Tuesday through Thursday.

A lesser heat advisory was in effect for west Texas and southeast New Mexico into Monday evening, with high temperatures well into the triple digits, the service said. Still, it was so hot in Las Cruces on Monday morning that afternoon school bus service was cancelled.

The weather agency uses a complicated formula that varies from region to region to declare an excessive heat warning, including close to record-breaking temperatures.

Some of the highest temperatures over the next few days were expected in Phoenix, where the weather service issued a tweet to warn residents to stay hydrated and take advantage of cooler indoor buildings.

The tweet says officials “can’t stress enough that it will become dangerously hot early this week.”

Firefighters and city officials on Monday morning distributed bright red cloth visors, hand fans and blue-coloured cooling neckerchiefs to downtown commuters, advising them to stay inside as much as possible.

“I’m hoping to stay in the air conditioning all day, and I’m planning to take it easy,” Lisa Kirby said, who was visiting from Rhode Island for a conference. Kirby said she visited the area several summers ago and had a hard time dealing with the heat.

Fire Capt. Jake Van Hook said the department gets dozens of calls a day about heat-related illnesses during excessive heat warnings. “They range from someone who just needs to get inside to someone who needs to get urgently to the hospital,” he said.

Maricopa County public health officials say 155 people died in the Phoenix area last year from heat-caused illnesses like heat exhaustion and heat stroke.

Forecasters say monsoon moisture will slowly return to the Phoenix area from the east by the weekend. Arizona’s monsoons are summer rains that can cause flash flooding and bring heavy winds.

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