This week an article hit my inbox about barn safety from AQHA (American Quarter Horse Association). It applies to all barns, not just those that house horses, and I hope you will read through it, then go out and inspect your barn, shed, or outbuildings.
America's Horse Daily: Preventing Barn Fires
I do have a comment on one point in the article, about keeping hoses attached to water taps in your barn. Believe me, your hoses will melt if they are too close to the fire (so will the plastic bumper of your pickup truck, but that's another story). My advice is to have water spigots outside and at some distance from the barn, with hoses attached. I realize that in winter many people have to remove the hoses from the tap because of freezing temperatures. I don't know how to get around that problem.