More than a dozen cities throughout the Bay Area featured triple-digit temperatures Thursday as residents sweated out the hottest day of a week-long heat wave.

Brentwood, Concord, Walnut Creek, Pittsburg, Pleasanton, Livermore, Morgan Hill, Gilroy, San Jose, San Ramon, Danville, Vacaville and Sonoma all hit or surpassed the century mark, said Will Pi, a meteorologist with the National Weather Service.

The hottest cities in the Bay Area appeared to be Antioch and Livermore, which reached 106 degrees, officials said.

Several cities, including Brentwood and Vacaville, reached 100 degrees before noon.