As a former firefighter, it's not silly but DON'T call 911. (Tin knows that but for the lurkers I had to say it) Stop by the station and ring the front bell. Firefighters are exceptional, incredible people with nearly no exceptions. If they are not busy they will be intrigued and want to help if they can. That's actually a damn good idea.This is going to sound silly but call the Fire Dept, not emergency but explain what is going on. Our department has very high quality and extremely expensive infarred equip and Can detect the smallest hot spot. They would be able to find a cat. Do not call dispatch if you can help it, they might shine you on or say there is nothing they can do. Talk to an actual fireman, usually they care and will do something.