As of Monday, the National Weather Service will be issuing a new kind of tornado warning in Missouri and Kansas.
The new, more forceful and explicit messages are designed to get attention and drive people to take shelter during dangerous storms.
The Great Central U.S. ShakeOut is an annual event intended to raise awareness about what to do in the event of a major earthquake.
Steve Besemer of the Missouri Emergency Management Agency says in Missouri and Illinois, more than 900,000 people, most of them students, participated in today's drill.
He says if an earthquake hits, there are three simple steps people should follow.
St. Louis County will be re-testing some of its tornado sirens this week.
The county has already tested the new omni-directional, solar-powered warning system twice since Labor Day.
But a spokesman for the county’s Department of Highways and Traffic and Public Works, David Wrone, says residents living near 18 of the sirens haven’t been able to hear them.
St. Louis Public Radio is a service of the University of Missouri-St. Louis.