When there is concern about a potential exposure to a chemical or other airborne hazard, local officials will advise you to "shelter-in-place." This is unrelated to taking shelter on the lowest level of your home in case of a natural disaster like a tornado. To shelter-in-place:

1. Close and lock all windows and exterior doors.
2. Turn off all fans, heating and air conditioning systems.
3. Close the fireplace damper.
4. Get your disaster supplies kit and make sure the radio is working.
5. Go to an interior room without windows that is above ground level. In the case of a chemical threat, an above-ground location is preferable because some chemicals are heavier than air, and may seep into basements even if the windows are closed.
6. Using duct tape, seal all cracks around the door and any vents into the room.
7. Listen to your radio or television for further instructions. Local officials may call for evacuation in specific areas at greatest risk in your community.

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