"Shelter in Place" can be done at home, school, and work
Begin storing water in closed containers for future drinking and cooking.
Close all doors to the outside and close and lock all windows (windows sometimes seal better when locked)
Close all fireplace dampers.
Close all internal doors as possible.
Designate an interior room for shelter and be prepared to seal windows, doors and air vents with duct tape or plastic.
Do not go outdoors unless absolutely necessary. If so, limit time spent outdoors and cover your mouth and nose with a damp cloth or towel. When returning indoors, leave outer clothing outside. Wash your face and hands with mild soap and lukewarm water.
If necessary, children in affected schools will be sheltered there. Parents should not try to pick them up unless advised to do so.
Quickly bring everyone inside including pets.
Remain sheltered until local authorities announce the emergency is over.
Stay tuned to the radio or television for detailed instructions.
Turn off all air conditioners, fans, ventilation, and heating systems.
Use duct tape, plastic wrap, or aluminum foil to cover and seal bathroom exhaust fan grills, range vents, dryer vents, and other openings to the outside to the extent possible.