An excessive heat warning has been issued for parts of San Diego County from 10 a.m. Friday until 8 p.m. Sunday, according to the National Weather Service.
Dangerously hot conditions are expected in Borrego Springs and the San Diego deserts with temperatures up to 116.
Extreme heat can increase the potential for heat-related illness, particularly for those working or participating in outdoor activities. The weather service recommends drinking plenty of fluids, staying in air-conditioned rooms and out of the sun, and checking on relatives and neighbors.
Young children and pets should not be left unattended in vehicles.