Deer are still overpopulated in Door County despite all the recent extreme weather. A few days of the polar vortex does not have an impact on a deer's health. Josh Martinez, wildlife biologist of Door County with the Wisconsin DNR, says that deer in the area have evolved over thousands of years to handle the sometimes extremely harsh climate. So deer are still overpopulated in some areas of Door County and Martinez says that is causing problems with the ecosystem.

Martinez added that an extended period of cold into April and May is what can affect the deer population.