they now say mohamed lehouaiej rehearsed his attack twice. planning the same rent atruck of the same road he took thursday night when he plowed into crowds of people. survivors including americans still in shock. >> the terror of what was going to happen. the shock. >> and the people were just lying there like rag dolls. >> he was going totally intentionally, high speed, ramming on the people. >> reporter: of the nearly 300 people mohamed lehouaiej hit on this road, 18 are still on life support. >> tragic. nbc's bill neal reporting there. we do want to talk about storms causing dangerous flash flooding and stranding numerous vehicles. check out this dramatic video from china. a massive landslide comes crashing down on houses. nbc meteorologist bill karins is here with your monday morning forecast. a little hot? >> a little hot, right? some severe storms mixed in. yeah, the hot forecast continues. we are tracking really strong storms, ohio and cleveland, one of the spots that's going to get really strong storms in the next four or five hours.

here's what we know about the assailant, his name, mohamed lehouaiej bouhlel.k to his body. investigators say he was already on police radar for petty crimes, but he was not suspected of possible terrorism, or terrorism contacts. investigators found no real ties to extremists. this horrifying amateur video -- this horrifying amateur video shows the moment, the truck plowing into innocent people simply out celebrating bastille. the terrorist fired a gun while chris crossing through a crowded street. he barreled down a mile down the promenade not stopping until the police shot him dead. >> all of a sudden, you heard screaming, you saw hordes, thousands -- seemed like thousands of people running towards us, if you didn't run with them you would have been trampled yourself. so, we just ran along, not knowing anything. not knowing what was even going on. but just trying to escape. at the same time i was thinking, well, maybe i shouldn't be running. maybe i should be looking for a place to hide, because we couldn't hear any bullet shots. the music was so loud. it was