Look at that face and tell me that you're not intimidated. I'm pretty sure he's planning to kill me.
The second thing that was concerning me was hepatitis. My Granda once spent six months in hospital after rat urine got into a small cut on his leg. Hepatitis can be a bitch. And while I think that the water is a little fast to be badly infested, well, cities are cities and rats are rats and the obvious is the obvious, so I was a little alarmed. That's only prudent really.