The 10th winter Spare the Air alert this season has been issued for Monday by officials with the Bay Area Air Quality Management District.
Wood burning continues to be banned indoors and outdoors while the alert is in effect, air district officials said.
The alert was issued due to poor air quality in the region from recent cold weather, according to air district officials.
Wood smoke is a major source of air pollution for the Bay Area, consisting of fine particles and carcinogenic substances that can be dangerous to inhale, air district officials said.
Wood smoke can be especially dangerous to children, the elderly and people with respiratory conditions, they said.
"Although air quality is expected to improve mid-week, it is important that Bay Area residents not burn wood during this alert to protect public health," Jack Broadbent, air district executive officer, said in a statement.
"We are asking the public to consider the health of their family and neighbors in the new year by using cleaner, more efficient heating options for their homes," he said.
First-time violators of the restrictions are required to take a wood smoke awareness class in lieu of paying the normal $100 fine.
People who violate the ban a second time will be fined $500, and subsequent violations will result in higher fines.
Monday marks the fourth consecutive day such an alert has been issued.
The winter Spare the Air alert season began on Nov. 1 and continues through Feb. 28.
Those looking for more information on the air district's daily burn status may do so online at baaqmd.gov or sparetheair.org; by phone toll-free at (877) 4-NO-BURN; or through the Spare the Air iPhone and Android apps.