Costumed convention-goers and horse racing fans will enjoy coastal temperatures in the low 70s Friday, despite a swath of high pressure that will send highs in the deserts to dangerous levels.
There is an excessive heat warning in San Diego County’s deserts until 8 pm Friday, with temperatures in Ocotillo Wells expected to reach 117 degrees.
Inland communities like Escondido, San Marcos, El Cajon and Poway will have highs in the 80s.
Beginning Sunday, there is a chance of rain and thunderstorms in the mountains and deserts, mainly in the afternoon and early evening.
