For much of California, the arrival of September has brought extreme, scalding temperatures.

Sept. 5 was the hottest day in Los Angeles in nearly 11 months, according to AccuWeather. Temperatures in the Inland Empire and the Sacramento region soared into the triple-digits over the long weekend. And in the next few days, dangerous heat waves are projected for large swaths of the state, weather officials warn.

Across California, September tends to be warmer than we might like. It’s usually the hottest time of the year in the Bay Area and when temperature records are most likely to be broken in Southern California.