Some of y'all know that my apartment building in Richmond (where I rented, not like I owned it) burned down.
Well here's how it happened.
Each unit had it's own water heater in the kitchen. This total idiot upstairs had dragged several large gas-powered devices upstairs...one was a rototiller I think, one was definately a large generator of about 4000ish watts based on the size. Both had integral metal gas tanks.
About 4:00pm on a hot day, the setting sun's rays came in the window, hit one or both tanks, expanded the gas. Being heavier than air, it flowed along the floor until it hit the pilot light in the kitchen.
What a mess. I ended up running out with my laptop in hand and guns shoved in my pockets
. (They were loaded wheelguns, and had the fire gotten to my unit, they could have cooked off.) As it was, I had to inform the fire department I had about 800 rounds on tap.
Basically, any proper metal can kept in a cool dark place with NO PILOT LIGHT AROUND, and you're fine.
Coulda been worse. At least I'm managed to drive out the METH LAB in the basement some months before.