We send our thoughts to those affected by the recent tornado in Moore, Oklahoma.
If you're wondering how you can help, visit the American Red Cross to donate to disaster relief, or text "REDCROSS" to 90999 to make a $10 donation.
You can also download the Red Cross Tornado App for iPhone or Android.
The app will sound a siren when there's a tornado warning in your area, even when the app itself is closed.
It also includes emergency functionality, such as a flashlight, a strobe light to let others know where you are, and a notification to let others know you're OK.
You can download the free app from the iTunes or Google Play app stores or go here for more information.