L.A.'s hottest day ever How hot was it? The National Weather Service's thermometer downtown reached 113 degrees for the first time since records began being kept in 1877 â€” and then stopped working. The record highs follow a summer of record lows. - Los Angeles Times
Monday's records culminate a heat wave than began Saturday. The heat was produced by a muscular ridge of high pressure that anchored itself over Southern California. Those conditions combined with weak offshore winds that grew hotter as they pushed from the desert toward the coast. As a result, it was hotter in places like downtown, West Hollywood and Santa Monica than in some typically broiling inland areas.