Heat wave continues

Ramona tied a previous record of 101 degrees Thursday, with the thermometer forecast to possibly reach 106 Friday, as the summer heat wave continues through the weekend.

A heat advisory issued by the National Weather Service for the valleys, mountains and deserts will be in effect until 8 p.m. Sunday as an atmospheric high pressure lingers over Southern California. Forecasters said Friday and Saturday would be the hottest days.

In the forecast for Friday are highs of 101 to 106 degrees in the valleys, 97 to 103 degrees in the mountains, 113 to 118 degrees in the deserts, 84 to 89 degrees at the beaches, and 95 to 100 degrees in inland coastal areas.

On Thursday, the hot spell pushed afternoon thermometer readings to 91 degrees in Vista, which exceeded the prior top mark of 90, set in 2009, and to 87 degrees in Chula Vista, topping a previous milestone of 84, set in 2005. In addition to Ramona, other communities that saw their prior July 21 records tied included Campo with a high of 105 degrees and Escondido, which reached 99 degrees, according to the National Weather Service.

Forecasters advised the public to avoid potentially serious ailments by staying hydrated, avoiding unnecessary outdoor labor and checking on neighbors and relatives -- especially those with health conditions and who lack air conditioning.

Authorities also warned against leaving children or pets in parked cars, which can quickly become death traps in high heat.

County-designated cool zones in Ramona are the library at 1275 Main St. and Ramona Community Center at 434 Aqua Lane.