If you are told to take shelter, remain indoors. Close all doors and windows. Turn off air intakes, such as window fans and air intakes to air conditioners. School children will be safe. They will be cared for in their schools.
More information Keep pets inside.
If you can, shelter farm animals. Cover food and put uncovered food in the refrigerator. It is safe to eat or drink anything in sealed containers. Well water is safe unless you are told otherwise. If you must go outside, cover your nose and mouth with a cloth to filter the air.