Although the U.S. flag is at half-staff to mark the death of President Jimmy Carter, 8 Republican-led states will raise flags ...

The NWS has issued warnings this weekend after a powerful polar vortex plunged temperatures nationwide during the week.

A coronal mass ejection earlier this week may pull the northern lights to more northern U.S. states, forecasters said.

A first-of-its-kind investment gives an ethanol producer in North Dakota $205 million for stashing emissions underground. The EPA and Justice Department reached a settlement with Marathon Oil, ...

The NWS extreme cold warning for Duluth said: "The dangerously cold wind chills as low as 40 below zero could cause frostbite ...