At Vicksburg they must negotiate a 120-degree turn on the meandering Mississippi, then straighten up to pass under the railroad bridge and the Interstate 20 bridge.

NPR: Oil Leak: Miss. River At Vicksburg Remains Closed

Nearby on Interstate 40, between 20 to 30 cars were stranded due to flooding rains, said Figurskey.

CNN: Past 12 months warmest ever recorded in United States

From Ladera Ranch, the gunman headed north and pulled off Interstate 5 in Tustin, about 20 miles away, with a flat tire, police said.

NPR: Official: Calif. Gunman Was Loner, 'Gamer'

In Louisiana, police in DeSoto Parish had responded to at least 20 incidents, many on Interstate 49.

CNN: Heavy precipitation expected from Texas to New England

About 45 miles north of Denver, Interstate 25 northbound shut down Saturday afternoon after a weather-related incident ensnared 20 to 50 vehicles that either crashed or spun off the roadway, the Colorado State Patrol reports.

CNN: Spring snowstorm rocks Rockies, menaces Midwest

"This is the only car I've ever owned that you can be driving down the interstate and people pull up beside you and take a picture of it, " her husband, a retired 20-year Army veteran, said with amusement-tinged pride.

CNN: Saturn owners hope GM doesn't abandon them