Fresno's break from scorching summer heat will come to an end next week.
While temperatures in Fresno will remain in the low 90s Thursday and Friday, by Sunday they're expected to hit triple digits, said Modesto Vasquez of the National Weather Service in Hanford.
From there, Fresno temperatures are expected to keep heading north. Monday's high is expected to reach 106, then climb to 108 on Tuesday, and 109 by Wednesday.
A small wind system is expected to drop temperatures back down to the high 90s or low 100s by the Fourth of July.
The city of Fresno will open four cooling centers from noon to 8 p.m. on days in which the forecast calls for temperatures above 105. The cooling centers are at Frank H. Ball Neighborhood Center, 760 Mayor Ave.; Ted C. Wills Community Center, 770 N. San Pablo Ave.; Mosqueda Community Center, 4670 E. Butler Ave.; and Pinedale Community Center, 7170 N. San Pablo Ave. Sierra Vista Mall in Clovis will also open as a cooling center.
Vasquez said Thursday's below-average temperatures are due to increased winds. The San Joaquin Valley Air Pollution Control District warns those winds could pick up dust particles and pollution that may aggravate asthma, bronchitis and lung issues. The district advised people to avoid prolonged exposure to the wind.
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