Prolonged exposure to these temperatures will increase the risk of heat related illnesses, particularly for vulnerable populations.
An excessive heat warning goes into effect Sunday morning as temperatures continue to rise across the Southland, creating an "elevated fire danger" that will extend into next week, according to forecasters. Highs in desert areas were expected to remain above 110 for much of the week.
Alpine also set a new record low of 76 degrees on Thursday, while both Vista and Ramona both tied their previous records for the day. The first triple digit temperatures are forecast for Tuesday when the high in some areas will exceed 100 degrees. Highs will hover around the 100 degree mark for the remainder of the week.
During that same period, San Diego International Airport will record highs of 84, 91 and 88. Among the best places to be Sunday, besides the beach, was Downtown L.A., which only reached 81 degrees, but that is expected to change Monday, when NWS meteorologist Robbie Munroe says it should be 10 to 20 degrees above average.
What's the difference? Here are definitions for each term, straight from the National Weather Service. "Some heat related illnesses are serious enough to require hospitalization and could become fatal if left untreated".
The weather service attributed the heat wave to a "strong upper-level high-pressure system over the region combined with weakening onshore flow".