Outside cats seem to seek shelter whenever possible, especially if it has kittens. People often leave water or cat food outside so that they can help the outdoor cats. Sometimes this causes a problem though because there may be lots of cats that start to swarm and live close to their home (this happened to my friend).
Cars. I always worry about kittens because far too common the mother will get hit by a car leaving the kittens to survive on their own.
