>> this could be very imminent danger within minutes. if the levee was to break, you will have very, very short time to get out of the way. >> seven people have been killed by severe storms and flooding in arkansas. the governor has declared a state of emergency after a tornado ripped through an air force base in little rock. thousands lost power during the thunderstorms last night. in some counties they're getting so many calls for help they've run out of medics and ambulan ambulances. >> it was raining so hard you couldn't see nothing. and then it started doing all this. it happened so fast. >> we all ended up in the closet and then you could just hear crashing and stuff being knocked around and blown around. it just tore us up. >> take a look at this video sent by a cnn i-reporter colin wakefield. he shot it from his second floor apartment in fayetteville, arkansas. the street below covered by two