I still think you should call the police to make sure there's a report on this just in case you have more trouble. Maybe you could try leaving a light on outside after dark to scare any mischief away. Why not write another letter thanking whoever did this, I'm sure it would hit home.
Sounds like they're closing the whole town down, doesn't make much sense to close down all the volunteer agencies. Maybe you need a huge dog along with your kitties.