The record-breaking heat wave that kept much of San Diego County roasting over the weekend is expected to begin to ease up Monday, with temperatures in some areas 5 to 10 degrees cooler.
On Sunday, a stifling 107-degree high in Campo topped by one degree the previous record set in 1962, and a high of 103 degrees in Ramona was 4 degrees higher than the prior record, set three years ago, according to the National Weather Service. Highs of 102 in Alpine, Escondido and El Cajon broke records set in 1992.
Forecasters said very hot weather was expected Monday in the deserts, but most other areas would be somewhat cooler. The valley areas could be 5 to 10 degrees cooler than on Sunday. An excessive heat warning for the deserts is set to expire at 9 p.m.
Highs Monday of 76 to 81 degrees are forecast for coastal areas, as are highs of 84 to 89 inland, 89 to 94 in the valleys, 87 to 95 in the mountains and 109 to 114 in the deserts.
"Very hot weather will continue in the deserts today but with slight cooling from recent days as high pressure aloft begins to slowly weaken," according to the weather service. "The gradual slow cooling will continue into next weekend."
The weather service advised residents once again to take precautions against dehydration, heat stroke and other heat-related illnesses.
Seniors, kids and pets lacking adequate shelter are most susceptible. Authorities also warned against ever leaving children, senior citizens or pets in parked cars, which can quickly become death traps in high heat.
Those working in hot zones over the warning period were advised to reschedule strenuous activities, when possible; wear lightweight and loose- fitting clothing; drink plenty of water, but avoid sugary beverages; take frequent breaks in shaded or air conditioned areas; and watch for signs of heat exhaustion and heat stroke.