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The temperature spiked to the 80s as early as 10 a.m. at the fair and climbed even higher as the day wore on.
In addition to sun block and parasols sold at the event, fair officials said people were able to take advantage of a jumping fountain, misters and air-conditioned buildings to keep cool - not to mention cool treats like ice cream, lemonade and various frozen foods to beat the heat.
Sweet treats may stave off the heat temporarily but hydrating is key when the humidity and high temps combine for a potentially dangerous situation.On Saturday, a 1-year-old boy and his 2-week-old sister had to be rescued from a hot parked car while their mother was shopping in Cudahy. The mother, 18, was arrested for child endangerment.
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Temperatures will climb to 90 in Orange and Los Angeles counties, 103 for the Inland Empire and valleys, 83 for the local mountains and 105 for the high desert. Temps will stay high before dipping just a few degrees Wednesday and Thursday.
Cooling centers have been set up throughout Southern California, and Southern California Edison also has sites established throughout the state.
Find a cooling center in your area
A huge area of high pressure across the southwest is driving a lot of heat our way. The system is also bringing in some subtropical moisture, creating monsoonal thunderstorms across the mountain areas and the high desert. The possible thunderstorms in the mountain and desert areas could trigger some flash flooding and small hail.
Saturday, the desert and mountain areas was hit with rain, thunder and lightning. The National Weather Service issued a flash flood warning for San Bernardino County, but that has since been lifted.