Even if they were on the same gas line you'd think they'd have checked the damn thing after the first one. Off the top of my head I can't think of anyone whose powers do explosions, except indirectly by causing sparks maybe. I think there are a few that do electrics. Of course that would lead to the question of why anyone capable would be at the church on a Monday night. Gas station seems a lot more likely to be an accident, powers or not.
Her powers warp reality. Your Wanda doesn't seem capable of the same things.