It's interesting to me that in both cases, the homeowners knew that there were shelters on their properties but no one bothered to check them out until recently.  If I were buying a house, I would want to check out what was on my property either before or right around the time of purchase.  It said the shelter in Wisconsin had water in the bottom of it.  That had to be nasty inside.  I had a plastic bin in a closet at my place which I put supplies in (water, a few cans of food, etc.).  For some reason, the plastic on two of the water containers busted at some point, and after mixing with some other stuff it got all mucky.  Since I didn't check the bin very often, I didn't know anything was amiss except for the fact that we started getting little flies flying around.  I thought they were fruit flies and I kept trying to clean out the drains with bleach to stop the problem.  I finally opened the plastic storage bin and found that the flies were breeding inside it, and the smell of the murky liquid in the bin was atrocious.  I had to throw away virtually all the contents inside it.

Yeah, I guess I didn't think that an unopened gallon of water (the kind bought from the store) would spontaneously combust (actually, two of the containers burst open).  Why this happened is a mystery to me.  From the look of them, it looked like they imploded.  I know that you're supposed to rotate water every 6 months, and I think I didn't check on my supplies for 9-12 months when this episode happened.