Extinguish any open flames, including candles, smoking materials and incense immediately.
Leave all electronics and appliances in the present state. Do not turn anything on or off, including light switches, lamps, all appliances, televisions or cell phones, if you suspect a leak. According to Independent Propane Company, even the small spark of electricity in an appliance is enough to trigger a fire or explosion when a propane leak is present.
Notice the smell the area near the range. Propane has a distinctive, unpleasant odor similar to that of rotten eggs, skunk spray or of a dead animal.
Get everyone out of the house immediately, if you smell propane, even if the scent is very faint.
Go to the propane tank, lift the hood and close the service valve by turning the knob completely to the right.
Call your propane supplier or licensed repair person immediately. Do not go back into the home until everything has been repaired and tested for further leakage.