Its usually in hot, stagnated water. The drought has made it more possible for something of the sort to show up this far north. Don't worry, you don't get it by standard contact with the water. It enters your body through the sinuses basically. So in order for you to get it you have to get one heck of a nose full of water, and have the bad luck enough of one of those things actually being in there and staying in there. Once it builds in your nose, it can enter to your brain from there, and it essentially is a lot like meningitis. Odds are low but it can happen obviously. Bad thing is it usually kills you within a day or two of you knowing to have it. This stuff usually comes up more prominently down south, but even there its rare.