Scorching heat will retain its grip on parts of San Diego County through at least Thursday, forecasters said Tuesday.
The National Weather Service extended an excessive heat warning for the San Diego County deserts until 8 p.m. Thursday. The warning began at 10 a.m. Tuesday.
The forecast calls for high temperatures of 115 to 120 degrees, with overnights lows still in the 85-to-90 range.
"Very warm night-time temperatures will limit heat relief, acting to increase heat stress for those without adequate access to cooling," the NWS said.
In addition, heat advisories were in effect through 8 p.m. Wednesday in the valleys and mountains below 6,000 feet, calling for highs in the 90s to 100s.
Residents were advised to "drink plenty of fluids, stay in an air-conditioned room, stay out of the sun and check up on relatives and neighbors."
The county has opened "Cool Zone" locations to help the public beat the heat. A full list of the locations can be found online.
San Diego County Cool Zones
City of Oceanside Country Club Senior Center
Pala Fire Department
Pala Fitness Center
Lakeside Community Center
Santa Ysabel Nature Center
Potrero Library
La Mesa Adult Enrichment Center
Fallbrook Community Center
Spring Valley Park and Recreation
Borrego Springs Library
Heritage of the America's Museum
City of San Marcos Senior Center
Alpine County Library
Valley Center County Library
Ed Brown Senior Center
Ramona Library
Visit 211sandiego.org for more information or call 2-1-1.