There have been a bunch of shows on Discovery, Sci channel recently about the invasive spieces problems in Florida. The pythons seems to be the biggest problems. Floridas climate is very acclimating for these type of snakes. Problem is getting out of control down there.
I believe these snakes exist in southern florida , and were introduced in the last 50 years via released pets breeding, but they are a bit vulnerable to a cold spell....a serious ( epic) frost might kill 95% of these snakes ?
normal Fla weather, and they be OK !
Python ain't gonna kill you, your cat/dog is a nice target for a 10 foot python.