Click here for information on contacting loved ones and Red Cross aid
Fallin told a Monday news conference that a center for those seeking loved ones has been set up at a church in Moore, where an afternoon tornado flattened entire neighborhoods and destroyed an elementary school with a direct hit. She says responders are working as quickly as they can to sort through the rubble.
Authorities who joined Fallin say search and rescue efforts are ongoing and will continue overnight.
The governor says the state will spare no resource in the tornado recovery and will consider using Oklahoma's rainy day fund in the effort.
Those trying to contact loved ones in the disaster zone may want to visit the Red Cross' "Safe and Well" database online.
You can access that on RedCross.org where you can also make a donation for the relief effort or by calling 1-800-RED-CROSS.