There's burn marks on the concrete aisle where I board.
My then 4yr old was throwing a hellacious tantrum, slipped off the mats in the aisle, slid on the concrete which produced a shower of sparks and caught the loose hay on the floor on fire. Just happened that someone had left a partial bucket of water sitting a couple feet away, so I immediately doused it.
I'm in CO and things are beyond extremely dry here. I now sweep the aisle of any loose hay before putting my horse in the cross ties.