Some 900,000 Virginians are expected to participate in the annual statewide tornado drill.
The drill begins Tuesday at 9:45 a.m. with a test tornado warning from the National Weather Service. The message will be relayed by broadcast outlets through the emergency alert system.
That simulates what listeners would hear during an actual tornado.
Once the test warning is sounded, people should move quickly to a safe area in a sturdy building. Safe areas include basements and interior rooms on the lowest level of a building. Once in the safe area, people should crouch down or sit on the floor facing down and cover their heads with their hands.
Twelve tornadoes hit Virginia in 2014, causing more than $700,000 in property damage.