Always take gasoline seriously.
However, hopefully you don't have heavy enough fumes to be spark sensitive or else that's an even more critical thing to fix (imagine driving over someone's tossed out cigarette butt). If you have any actual wetness, do something about that. if it's dry there should be no problem.
'89 Wrangler YJ
97 Grand Cherokee (ZJ)
87 MB 560SL roadster