The National Weather Service in Hanford forecast a high of 91 degrees in Fresno for Friday, a staggering 22 degrees above the average for this time of year.
The weather service said the high temperatures should drop to 84 on Saturday and 81 on Sunday before climbing back up to 87 on Monday.
Temperatures will cool back down to about 80 throughout next week.
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There will be no chance of rain for at least the next 10 days, the weather service said.