The fact that Tom found a large Burmese python in good shape after the cold temps in S. Florida is interesting. Exactly how far south did sub freezing temps extend into the state? The key would be the length of time the temps were below freezing. A hard freeze is considered to be temps below freezing for several hours. If the temps reached 32 degrees for a brief period of time (an hour or less) many reptiles could survive that type of event.