In one of the neighborhoods I lived in growing up, two houses were leveled by a gas exposion, and a 3rd damaged so badly it had to be leveled. Leak caused by utility construction in the street nearby. I was at school, but mom said that insulation came out of the sky like snow at our house a 1/3rd of a mile away or so.
Lesson: Take natural gas piping and connections seriously.
Oh, 3 people died in that one.
Or burn fuel oil.
Not a lot of asphyxiations or explosions connected with that stuff.