Little change is expected today as a late-summer heat wave sends temperatures in parts of San Diego County into record-breaking territory for a third consecutive day and the remnants of tropical storm Linda generate high surf at the beaches and thunderstorms elsewhere. On Sept. 9, temperatures of 99 degrees in Chula Vista and 97 in Vista topped previous records for that date of 91 and 96 degrees, respectively, both set in 1990. A high of 92 degrees in Chula Vista on Sept. 8 also set a record, according to the National Weather Service. Additionally, automated gauges in several locales in the valleys and mountains collected one to four tenths of an inch of rain. In Rincon Springs, near Valley Center, .66 inches of rain was recorded, according to the National Weather Service. A National Weather Service heat advisory for coastal areas and the valleys is set to remain in effect until 6 p.m. A flash-flood watch for all areas other than the coast will also extend through this evening. A beach hazards statement resulting from high surf will expire Friday afternoon. Forecasters said slightly less intense heat was expected Sept. 10 but again predicted that temperatures would be 5 to 15 degrees above average as a high-pressure system remains over California, forecasters said. Highs of 88 to 93 degrees are forecast today for the coast, 94 to 99 degrees in inland areas, 95 to 100 in the western valleys, 89 to 94 near the foothills, 81 to 90 in the mountains and 94 to 99 degrees in the deserts. Along the beaches, waves and surf of 3 to 5 feet are expected, with sets that could reach 6 feet north of Carlsbad. Strong longshore and rip currents are also expected. A cooling trend is expected Sept. 11 and should accelerate over the weekend and through next workweek, forecasters said.