Have a METAL coffee can, bucket, or something comparable in your car. If it has a lid, fill it 1/2 full of sand (if no lid, put sand in a sealable container so it doesn't spill and fill your can/bucket when needed). Place 2 or 3 hurricane candles (or any long burning candles you might have) in the sand and light them (have a minimum of 10 candles).The reflection of heat from the metal and sand WILL heat your car... this will also save you gas, and provide sufficient light for a passing motorist to see, and keep your water from freezing.
Have a METAL coffee can, bucket, or something comparable in your car. If it has a lid, fill it 1/2 full of sand (if no lid, put sand in a sealable container so it doesn't spill and fill your can/bucket when needed). Place 2 or 3 hurricane candles (or any long burning candles you might have) in the sand and light them (have a minimum of 10 candles).The reflection of heat from the metal and sand WILL heat your car... this will also save you gas, and provide sufficient light for a passing motorist to see, and keep your water from freezing.