I live in central Florida and some years ago there was a cold for down here winter. The natural gas lines suffered low pressure and the gas company actually shut down portions of the gas system. If i remember correctly the guy from the gas company said it took about three days to get everyones gas turned back on. Part of the reason it took so long was they had to go to all of the places that had shortages and turn off all of the individual gas supplies, turn the mains back on, and then go turn back on all of the individual supplies, and relight all of the pilot lights. So to answer your question, yes your natural gas supply can go out. But it is a rare occurrence.