All emergency calls are put into the same database. Saying you think something is going to blow up isn't going to get them to your house any quicker.
If you open your door and get hit by a wall of gas get the fuck out and shut the door. Call the fire department first if you want but call the gas company as well. If there isn't a fire they are just gonna wait on the gas guy to shut off the line, they don't want to play in a gas rich environment any more then you do.