A sighted tornado is moving directly toward the bus and evacuation is ordered. What should the driver do if no building shelter is readily available?

1. Escort students to a nearby ditch or culvert, have them lie face down with hands covering their heads, and keep them far enough away that the bus cannot topple on them
2. Keep students standing beside the bus windows
3. Move students to a low area known to flood quickly
4. Have students remain in the aisle and open all windows