Sunday heats shatter temperature records in Oakland, Gilroy

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An influx of heat Sunday in the Bay Area shattered temperature records for Oakland and Gilroy, meteorologists said Monday.

Gilroy’s 102 degrees Sunday surpassed its record of 98 degrees for the day set in 1984, said Roger Gass, a National Weather Service meteorologist. Oakland’s record-breaking heat was more modest, hitting 89 degrees, 1 degree higher than its previous record of 88, met on Sept. 18, 2003 and again on the same day in 2011.

ALAMEDA, CA - MAY 14: A sunbather sits on the beach at Alameda Beach on May 14, 2014 in Alameda, California. The San Francisco Bay Area continues to experience record breaking temperatures with highs in the low 100s in the inland areas and 90s at the coast. The heat wave throughout the Bay Area will taper off on Thursday. (Photo by Justin Sullivan/Getty Images) less ALAMEDA, CA - MAY 14: A sunbather sits on the beach at Alameda Beach on May 14, 2014 in Alameda, California. The San Francisco Bay Area continues to experience record breaking temperatures with highs in the ... more Photo: Justin Sullivan, Getty Images Photo: Justin Sullivan, Getty Images Image 1 of / 1 Caption Close Sunday heats shatter temperature records in Oakland, Gilroy 1 / 1 Back to Gallery

Richmond, meanwhile, tied its record of 90 degrees. The last time the city got that hot on Sept. 18 was in 2000, Gass said.

The unseasonably hot weather was expected to cool as the week progresses before weekend temperatures creep up again. San Francisco, for instance, hit 86 degrees Sunday and was forecast to drop to the mid- to high-70s Monday.

“Today should be rather warm again, but we’re not expecting any record-breaking temperatures,” Gass said Monday. “There will be robust cooling on Tuesday and Wednesday and into Thursday, and then temperatures are expected to warm up again.”

The heat over the weekend, combined with weak winds, smoke from the Soberanes Fire in Monterey County and car exhaust, brought unhealthy air conditions that were expected to persist into Monday, according to Gass and officials at the Bay Area Air Quality Management District.

Kimberly Veklerov is a San Francisco Chronicle staff writer. Email: kveklerov@sfchronicle.com Twitter: @kveklerov