Snow, sleet, freezing rain, heavy rain, and strong winds are already taking place across the U.S. The storms, which began on the West Coast, have now moved into parts of Texas, New Mexico, Arizona, and Oklahoma. At Oklahoma City’s Will Rogers World Airport, about ten percent of flights were canceled Sunday because of severe weather warnings.

Four people have already been killed in Oklahoma since Friday, as well as at least five people in New Mexico, including a 4-year-old girl on U.S. Highway 70. Twenty more people in New Mexico were injured because of crashes near a pileup that claimed three.

Now, many airports are taking precautions; nearly 300 flights out of the Dallas-Fort Worth International Airport were postponed indefinitely on Sunday because of storm threats, according to the airport’s Twitter page.

In anticipation of winter precipitation, airlines @ #DFW have pre-cancelled about 300 departures to reduce the number of stranded travelers.

— DFW Airport (@dfwairport) November 24, 2013

Forecasters at the weather service in the Dallas area are now saying that it won’t be quite as bad as originally expected, though it will still be dangerous for Thanksgiving travelers.

Parts of the South and Appalachia are expected to receive heavy rain, sleet, snow, and freezing rain through Monday evening. States who are predicted to see the worst weather in the South include parts of Georgia, South Carolina, Alabama, Florida and Mississippi.

Most of the horrendous weather is expected to move out by Thanksgiving Day, although the Northeast is still under a snow advisory until Friday.

Main image courtesy @NWSFortWorth via Twitter.