The eastern two-thirds of the United States is experiencing some of the coldest weather of the autumn season.

As the coldest temperatures in two years moved into South Florida, cold-stunned iguanas like this one are a sight to be seen, Jan. 22, 2020, in Dania Beach, Florida. That has forecasters at the National Weather Service in Miami warning of possible falling iguanas. It’s also something that has been observed over the years in south Florida. Falling iguanas will be possible Christmas morning in parts of FloridaWhile this kind of behavior has been documented before, it is far from normal. Part of that could have to do with how infrequent temperatures drop to this level in South Florida.

MIAMI, Fla. – The National Weather Service routinely warns people about falling rain, snow and hail, but temperatures are dropping so low in South Florida the forecasters warned residents Tuesday about falling iguanas. “This isn't something we usually forecast, but don't be surprised if you see Iguanas falling from the trees tonight as lows drop into the 30s and 40s. Iguanas are native to Central America, tropical parts of South America and some Caribbean islands. Iguanas are allowed to be kept as pets in Florida but are not protected by any law except anti-cruelty to animals. They've been in South Florida since the 1960s, but their numbers have increased dramatically in recent years.

Different National Weather Service offices have issued freeze alerts, in addition to wind chill advisories. NWS Headlines - FloridaA wind chill advisory here would indicate wind chills below zero to 15 or 20° below. In south Florida, a wind chill advisory is issued when the wind chill falls between 25 and 35°. Once temperatures reach a certain level, iguanas stiffen up and fall out of trees. When iguanas fall from treesWhile this kind of behavior has been documented before, it is far from normal.