The U.S. Army has closed Fort Hood as a result of the weather. Only mission essential personnel are to report to the Killeen, Texas, base, its public affairs office says.
Here's the latest update from Houston Office of Emergency Management spokesman Michael Walter:
"We still have ice on the roads and overpasses. A lot of roadways are closed and nearly all of our interstates have ramp closures or lane closures because of the overpasses."
"If you don't need to be on the roads, stay off them."
"We've had a significant increase of motor vehicle accidents compared to yesterday, or a normal day."
-- CNN's Nick Valencia
Louisiana Gov. Bobby Jindal has signed an emergency declaration due to winter weather moving through southern Louisiana.
The weather system that affected Houston is moving off to the east, where the National Weather Service has issued a winter storm warning for parts of southern Louisiana. The Louisiana State Police report deteriorating road conditions throughout the region, and are asking motorists to avoid travel except in emergencies.