Better take a week chipping away like a big wuss than end up sitting on top of a mushroom cloud.
Whilst any gas leak isn't particularly wanted, gas escaping straight to atmosphere isn't going to cause too much of an issue in the short term, unless it gets ignited. Had a Gentleman with many years experience in gas supply works taking us for a National Roads and Streetworks course, he told us an external escape into fresh air was pretty low down on his list of worries when getting called out to a leak. If ignited it will burn rather than explode.
Gas escaping into an enclosed space is the danger. We are all I think, aware of the catastrophic results of a gas explosion within a building.