The Bay Area Air Quality Management District is asking residents to check before burning any wood fires on Christmas Eve or Christmas Day since predicted light winds and cool air may create unhealthy air conditions across the region. . . . The district has already issued two winter Spare the Air alerts, its first one falling on Thanksgiving Day. On these days, Bay Area residents are prohibited from burning wood or manufactured fire logs in fireplaces, wood stoves, fire pits or in any other place. The ban extends to both indoor and outdoor fires.