Ongoing gusty winds have weather officials extending a high fire danger warning until Thursday morning.
The red flag warning started at 10 p.m. Monday and was due to expire this morning.
Instead weather officials looked at continued winds, expected record-breaking high temperatures and dry air and extended and added red flag warnings to huge sections of the state.
The warnings now stretch from northern Mendocino County and throughout Lake County down through parts of Marin County and south of San Francisco into San Jose, as well as a huge portion of Southern California.
A strong breeze combined with gusts, low humidity and the very dry hillsides have created critical fire weather conditions leading to the unusual warning for January.
Areas of high concern are in the North Bay and East Bay hills.
Sonoma County fire dispatchers and Cal Fire captains in the North Bay reported no grass fires Monday night.
Tuesday night, north to northeast winds are expected to be 10-20 mph with gusts to 30 mph. Along ridges, gusts could get to more than 40 mph.
Fire officials warned residents to be extra careful.