Programming changes: Several NBC shows rescheduled due to severe weather
Up to the minute closings and delays

Authorities warn of scammers after tornadoes

Officials are already warning Oklahomans of scam artists who move in as soon as the storms move out.

Many are offering their services to clean up limbs, trees and debris, all for a price.

Be on guard for those looking to make a quick buck from those in need.

Check credentials and only work with reputable companies or individuals, not just anyone who knocks on your door.