In the unlikely event of an accidental or intentional release of hazardous chemicals or biological agents in the area, the best action may be to shelter-in-place. This is a precaution aimed to keep you safe while remaining indoors. Shelter-in-place means selecting a small, interior room with no windows, and taking refuge there. It does not mean sealing off your entire home or office building.
The following are guidelines to follow if sheltering-in-place is advised.