You may be instructed to "shelter-in-place” or “seek shelter indoors” if chemical, biological or radiological contaminants are released into the environment. This means you must remain inside your home, office or public building and protect yourself there. The following steps will help maximize your protection:
- Close and lock all windows and exterior doors.
- Turn off all fans, heating and air-conditioning systems to avoid drawing in air from the outside.
- Close the fireplace damper.
- Get your emergency kit and make sure the radio is working.
- Go to an interior room that's above ground level (if possible, one without windows). 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.
- Using duct or other wide tape, seal all cracks around the door and any vents into the room.
- Continue to monitor your radio or television until you are told all is safe or are advised to evacuate.