Freeze watch for parts of Bay Area over holiday weekend

The Bay Area could see temperatures drop below freezing this weekend. The National Weather Service issued a frost advisory that lasted through 10 a.m. Saturday, and a freeze watch from Saturday night through Sunday in parts of the north bay. 

Are you breaking the law if you warm up your car in your state?

While there is no national law against idling a vehicle, some states have anti-idling laws to prevent air pollution. The punishment and exact anti-idling measures vary from state to state, and even city or county, with penalties ranging from fines to written warnings.