Citing recent heat-related deaths in the Phoenix area, state health officials are advising people to limit their exposure outdoors because temperatures are reaching 115 degrees and higher.
"People need to be diligent about staying indoors, wearing light clothing and drinking water," said Will Humble of the Arizona Department of Health Services.
Humble added that people also should check on each other to make sure friends and neighbors are staying healthy and out of the heat.
"This is a good time to check on your neighbors, especially if they are elderly, living alone, or may have been affected by the weekend's power outages," said Humble, the department's bureau chief of infectious diseases.
Young children and the elderly are among the most vulnerable to suffer from a heat-related illness.
A record high 116 degrees was reported Sunday at Phoenix Sky Harbor International Airport, surpassing the previous high of 114 degrees.
Seven people died in the Valley because of the heat, Phoenix police said. Also, a toddler died last week after she was left in a locked vehicle.
Such situations are all too common, according to AAA. In the last 12 months, AAA responded to 905 calls to unlock cars with children or pets inside. The heat is supposed to ebb as the monsoon season ramps up, the National Weather Service said. However, temperatures are expected to hit 115 degrees again Tuesday.