Heavy rain Monday morning has prompted the National Weather Service to issue a flash flood warning for parts of Amador and Calaveras counties that were scarred by the Butte Fire last summer.
"They just have been receiving decent rain all night and then just getting some heavier stuff moving over it now," says Jason Clapp, with the National Weather Service office in Sacramento. "So just put out a warning for any potential debris flows in the area."
In addition to debris flows, a flash flood warning for a burn area means rock slides are likely. The warning is in effect until 10:15 a.m.
"They tend to get little rocks falling down the hills quite often in any storm," says Clapp. "But especially with the burned area, the areas where it's scorched pretty good, they just don't have any vegetation to really hold the soil in. So if you get too much rain in there, it just gets saturated and heavy and it'll start sliding down hills."
STO issues Flash Flood Warning for Amador, Calaveras [CA] till 10:15 AM PST https://t.co/PK2qDnQO2h— NWS Sacramento (@NWSSacramento) January 18, 2016
A previous storm soaked the Sacramento region, dumped fresh snow in the Sierra Nevada and brought a high tide that flooded some coastal areas over the weekend.
Forecasters say the region is expected to receive up to 2.5 inches of rainfall before the storm spreads further inland.
The rain has already made for a rough Monday morning commute.
"There's a lot of accidents out there," says Clapp. "Driving out there, there's been a lot of slipping and sliding off the road and into ditches. And there's some standing water on the roads out there. We have an urban and small stream flooding for the Northern San Joaquin Valley and then kind of south of Sacramento."
A second rainstorm is expected to make landfall Monday night and Tuesday.
The Associated Press contributed to this report.