I live in Costa Mesa. I keep an Iguana in the laundry room in a cage with a tub in it that can be drained by just pulling the plug. It is very cold in there at night. He does just fine. My neighbor has a big male in an outdoor cage that never goes inside. He is now huge! He does have a heating pad and heat lamp during the winter, but otherwise he lives without any heating most of the year round. She has had him 13 years. I believe. You can e-mail me at maucar123@yahoo.com. Maureen