Crews from Sacramento Metro Fire and Cosumnes Fire departments are fighting fire and trying to protect homes near Bradshaw and Gerber roads.
The fire was reported just before 3 p.m. Monday.
Structures near Prairie Dunes and Piping Rock Drive are being threatened by the blaze, with flames reportedly burning very close to homes.
Flames may have extended to at least one home.
Twelve engines, two water tenders, one dozer and a helicopter are working to contain the fire.
A FOX40 News reporter is en route. Watch FOX40 News at 5 for the latest on this developing story.