>> vast majority of deaths, i can't stress this enough, people driving into water. especially driving into water at night. all of you, when talking to folks, especially with water still rising here, continue to express to your friends, neighbors, everything else, please don't do that. >> reporter: now that was missouri governor jay nixon, he has activated, by the way, the national guard today to help provide security in some of the evacuated areas, as well as to help direct traffic around blocked roads like this one, jim. >> thanks very much for being on the scene for us. i want to bring in meteorologist tom cedar. i know you're a local boy, you know st. louis well. give us the layout. not just talking about one river. it's several rivers coming together and all of the rain has to go somewhere. >> absolutely. talk about river flooding along the mississippi, it's in the spring, after the snow is melting. not, of course, heading into winter.