• If you have a propane tank system, contact your propane supplier, turn off valves on the system, and leave valves closed until the supplier inspects your system. Tanks, brass and copper fittings and lines may have been damaged from the heat and be unsafe. If fire burned the tank, the pressure relief valve probably opened and released the contents. Check for gas leaks starting at the water heater. If you smell gas, get everyone out of the area and house; if safe to do so turn off the main gas valve, open windows and contact the gas utility or propane company. Small 5 gallon propane tanks (BBQ propane tanks) affected by the fire may be returned to propane seller or can be recycled at a metal recycling facility.