As the temperature starts to drop and people look to warm up their homes by stoking a roaring fire, the regional air district is reminding residents to check to make sure it’s legal to have a fire blazing that day. The San Joaquin Valley Air Pollution Control District’s Check Before You Burn program , now in its 14th year, started up again on Tuesday. During Check Before You Burn, which runs through the end of February each year, the Air District issues a daily wood-burning status by county.