An excessive heat warning will be in effect for parts of San Diego County from 10 a.m. Thursday to 8 p.m. Sunday, the National Weather Service announced Wednesday.
"That area of high pressure is going to keep sending us that offshore flow, it's going to keep warming us up. It's going to be very warm over the weekend," NBC 7 Meteorologist Sheena Parveen said.
Dangerously hot conditions with highs of 112 to 117 are forecast in the San Diego County desert areas.
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Temperatures will increase through the weekend with temperatures Friday and Saturday 10 to 15 degrees above average. Saturday will be the warmest with possible near-record high temperatures. Sunday will still be unseasonably warm and sunny before we cool down slightly early next week.
Extreme heat can increase the potential for heat-related illnesses, particularly for those working or participating in outdoor activities, according to the NWS.
The NWS recommends drinking plenty of fluids, staying in air-conditioned rooms and staying out of the sun. Check on relatives and neighbors, and young children and pets should not be left unattended in vehicles.
Those overcome by heat should be moved to a cool and shaded location, and call 911 if they appear to be experiencing heat stroke, the NWS said.