Air quality officials extended a No-Burn Day alert through the rest of Friday night for residents living in the South Coast Air Basin.
This area includes Orange County and non-desert portions of Los Angeles, Riverside, and San Bernardino counties, according to the South Coast Air Quality Management District (AQMD).
"South Coast AQMD reminds residents in these areas that burning wood in their fireplaces or any indoor or outdoor wood-burning device is prohibited at any time on No-Burn Days," wrote the organization in a release.
According to AQMD, the rule prohibits burning wood and manufactured fire logs, "such as those made from wax or paper."
This alert is in effect until 11:59 p.m. on Dec. 6, and is mandatory for residents to follow "in order to protect public health when levels of fine particulate air pollution in the region are forecast to be high anywhere in the South Coast Air Basin."
However, this alert does not apply to mountain communities above 3,000 feet in elevation, the Coachella Valley or the High Desert.
"Homes that rely on wood as a sole source of heat, low-income households and those without natural gas service also are exempt from the requirement," clarified AQMD. "Gas and other non-wood burning fireplaces are not restricted."
For an interactive map of the areas included in this alert, as well as more information, click here.