Cal Fire, the California Department of Forestry and Fire Protection, is at peak staffing.
RELATED: Watch your latest AccuWeather forecast
"Activity has started to pick up over the last few days," said Cal Fire Division Chief Jim Crawford. "A lot of that is attributed to equipment use. So what we ask and remind people is that please don't use mechanized equipment on dry windy days."
The heat brings more than just fire danger.
RELATED: Heat stroke or heat exhaustion: Do you know the difference?
Alexandrea Scott was arrested in Willits, in Mendocino County, on June 20. The Sheriff's office says her 18-month-old son died after he was left inside a vehicle for several hours.
"That is a big concern for us," Crawford said. "We ask people to be extra diligent."
RELATED: How hot can the inside of a car get in 10 minutes?
In Santa Clara County's Morgan Hill, a good place to cool off is the Centennial Recreation Center off Edmundson Avenue near Monterey Road. It's open all weekend as one of two cooling centers in the city.
Gilroy resident Doris Squeri shared her tips for staying cool: "We just try to hunker down and just stay cool. Close the windows and close the shades and stay in when we can."
Click here to watch the latest AccuWeather forecast, and click here to download the ABC7 News App to get your weather forecast on the go. And make sure you enable push alerts for immediate notifications and severe weather alerts.