Trump assumes office at an indoor inauguration ceremony, while supporters gather at the Capital One Arena to celebrate.

A polar vortex that has hit much of the U.S. with ice and snow has dealt a glancing blow to Florida, dropping coastal temperatures and causing the Sunshine State’s manatee popula ...

Florida's manatee population is seeking warmer waters due to a polar vortex, with many gathering near power plants. The species is still recovering from a mass starvation event.

ANNAPOLIS, Md. (AP) — A huge swath of the U.S. was blasted with ice, snow and wind on Monday as the polar vortex that dipped south over the weekend kept much of the country east of the Rockies ...

Why herds of manatees are huddling in water near America's power plants - A polar vortex that has hit much of the U.S. in a ...