Winds have begun shifting to the east, which drove the Eaton fire toward Arcadia and Monrovia early Wednesday morning. Smoke will more likely begin to blow into the eastern San Gabriel Valley, not as much to the south of the fire, Lyou explained. “Arcadia, Duarte and Azusa may see elevated levels (of bad air) from that fire,” he said.

The extreme fire conditions caused by a "life-threatening" windstorm have been deemed a "particularly dangerous situation," weather officials say.

At least two fires sparked in Southern California on Jan. 7 amid a “life-threatening and destructive” windstorm event that’s sweeping through the region.