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'Dangerous' heat in Tucson, western Pima County on Monday

Parts of Southern Arizona will again see "dangerously hot" temperatures as high as 114 degrees on Monday, particularly on the Tohono O'odham Nation and the western deserts, with blistering highs in Tucson and the metro area as well.

Thermometers around Tucson could hit 112 during the afternoon, National Weather Service officials said, with "near-record highs and isolated afternoon thunderstorms" kicking off the week. Sunday, a high of about 107 is forecast for the metro area.

Monday, an "excessive heat warning" will be in effect from 10 a.m. to 8 p.m., covering the Tucson area as well as western Pima County including the reservation, where temperatures could hit 114 degrees. Warnings also cover the Phoenix and Yuma areas and southeastern California. Highs of up to 117 will be possible near Yuma, NWS officials said.

"Extreme heat will significantly increase the potential for heat-related illnesses," forecasters cautioned. "Take extra precautions if you work or spend time outside. When possible reschedule strenuous activities to early morning or evening. Know the signs and symptoms of heat exhaustion and heat stroke."

"Drink plenty of fluids, stay in an air-conditioned room, stay out of the sun, and check up on relatives and neighbors. Young children and pets should never be left unattended in vehicles under any circumstances," officials cautioned.

From the Weather Service:

An Excessive Heat Watch means that a period of very hot temperatures, even by local standards, will occur. Actions should be taken to lessen the impact of the extreme heat.

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Stay indoors and seek air-conditioned buildings. Drink water, more than usual, and avoid dehydrating alcoholic, sugary, or caffeinated drinks. Dress for the heat — lightweight and light-colored clothing. Eat small meals and eat more often. Monitor those with a higher vulnerability to heat, including small children. Check in on family, friends, and neighbors, especially the elderly. If engaging in outdoor activity, take longer and more frequent breaks and avoid the hottest parts of the day. Never leave kids or pets unattended in cars.

Public cooling shelters are available in some areas. Consult county officials for more details, which may include guidance for proper social distancing measures.

Recognize the signs and symptoms of heat-related illness. Early signs include thirst and muscle cramps. Heat exhaustion may include: cool, moist, pale skin; headache; dizziness; weakness or exhaustion; nausea. The most serious illness is heat stroke, which may include: vomiting; confusion; throbbing headache; decreased alertness or loss of consciousness; high body temperature (above 105F); hot, dry skin; rapid, weak pulse; rapid, shallow breathing; seizures. Heat stroke can be DEADLY. Treat as an emergency and call 911.

Researchers at San Francisco State University conducted a study in 2003 that showed that the temperature inside a vehicle can rise to 114 degrees on a 95-degree day, and will rapidly rise to 140 degrees in under an hour even with the windows open.

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