Heat advisories will remain in effect until Wednesday evening throughout San Diego County mountain and valley areas, including Cajon, Escondido, Santee, San Marcos, La Mesa and Poway with temperatures expected in the triple-digits, according to the National Weather Service.
The excessive heat warning has also been extended through 9 p.m. Wednesday for our desert region.
Temperatures could be as high as 118 degrees and lows as high as 92 in the deserts, forecasters said.
Officials advised drinking plenty of fluids, staying in air- conditioned rooms, staying out of the sun and checking up on relatives and neighbors during extreme heat.
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Children and pets should never be left inside vehicles on days that are even a little warmer than normal, as locked cars can turn into death traps in mere minutes.
"Overall, temperatures across the county will taper by about 3-6 degrees Sunday, but it will still be warm over areas east of the coast. High pressure will stay parked over the southwest through at least mid-week, which will continue to drive the warmer temperatures," said NBC 7 meteorologist Brooke Martell.
Heat tips
High tides well over 6 feet are expected through 10 p.m. Sunday, with minor tidal overflow at low-lying beach parking lots and boardwalks.
"An increase of monsoonal moisture next week will bring a chance of thunderstorms mainly in the afternoons Monday through Thursday in the mountains and locally into deserts, with the greater chances on Tuesday and Wednesday," the NWS said.
No hazardous marine conditions are expected through Wednesday.
