The warmest portion of the year thus far is about to hit Southern California, and officials warn that it could bring potentially dangerous conditions.

KCAL News has issued a Next Weather Alert to warn communities about the extreme heat and increased fire danger. The alert will be in effect from Wednesday through Saturday for all communities in Southern California except for coastal areas.

Cities in Southern California that are forecast to cross the 100-degree threshold include Riverside (100), Ontario (101), San Bernardino (104), Lake Elsinore (105), Covina (100), and Santa Clarita (104). Other highs include 96 in downtown Los Angeles, 94 in Long Beach, 94 in Thousand Oaks and 96 in Anaheim.

The National Weather Service issued an extreme heat warning spanning most of the inland parts

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