I just spent the weekend with no electricity or heat at all, wow was it cold. Just above freezing weather, my poor frogs where freezing there buts off. I did my best to keep the room with the frog tank warm with a propane cook stove but it was cold enough to see my breath in the mornings. We had a huge freezing rain storm and it knocked to power out all over the place. My 4 Bronze Mantellas seem ok today, I have only counted three at once but its not often I see all for in the open. Three cold nights and 4 cans of propane later I realized I needed to account for power outages before now!