The American Red Cross is encouraging the public to download the free tornado app, available on iPhones, iPads and android phones. The apps include a high-pitched siren and tornado-warning alert that signals people if an NOAA tornado warning has been issued in the area.

The app also includes the location based tornado, severe thunderstorms and flood watch and warning alerts, enhanced weather maps, locations of open Red Cross shelters and other features. It is available in the Apple App Store and Google Play Store by searching for American Red Cross or by going to