From the Document: "The Shelter-in-Place Annex may be activated when students, staff, and visitors need to stay indoors where it is safer. Shelter-in-place is used during a variety of emergency events, including possible exposure to severe weather or hazardous airborne materials, when it is determined that conditions on the outside of the building, or in designated parts of the building, are unsafe. […This document describes] the Before, During, and After goals, objectives, and courses of action for Westberry Middle School to shelter-in-place. ."
Readiness and Emergency Management for Schools Technical Assistance Center: https://rems.ed.gov/