If a tornado is approaching and there is no nearby shelter, where should students go?

If students are evacuated due to a school bus being in the direct path of a sighted tornado, the driver should lead them to shelter in a nearby building. If no such shelter is available, the driver should escort them to a nearby ditch or culvert. They should avoid areas that may be subject to flash flooding and should be far enough away from the bus that it would not fall on them if it tipped over.