May 21, 2013 11:15 AM, EDT

Tornado Causes Widespread Damage in Oklahoma; Two Interstates Hit

The huge tornado that hit Moore, Okla., on Monday ran over two interstate highways, killed at least 24 people and caused massive damage in the Oklahoma City suburb, news services reported.

The mile-wide twister ran over Interstate 44, which runs North-South and roughly parallel to Interstate 35 just south of Oklahoma City, Oklahoma television station KWTV reported.

Update: FMCSA waives hours-of-service rules for truckers bringing relief to tornado-stricken areas.

The Oklahoma Highway Patrol shut down I-35 in both directions near Interstate 240 for several hours on Monday, the station reported on its website. The highway was reopened late Monday night, but traffic was extremely slow.

President Obama declared the region a major federal disaster area and ordered federal aid to supplement state and local recovery efforts, the Washington Post reported.

Federal Emergency Management Agency Administrator Craig Fugate is headed to Oklahoma Tuesday morning to monitor the federal assistance effort, the White House said.

The Springfield, Mo.-based group Convoy of Hope began sending trucks with emergency supplies to the Moore area Tuesday morning, Springfield news website reported.