The American Red Cross is urging families to take steps to heat their homes safely according to a new release. A freeze warning is in effect for much of Tennessee beginning Tuesday, Oct. 31, with the National Weather Service predicting overnight lows will drop into the mid-20s Tuesday and Wednesday nights.“Winter months are on the way, and temperatures will continue to drop, and many families are turning their heat on. Heating equipment is a leading cause of home fires in the U.S.