Which of the following actions should be taken if shelter-in-place is implemented?

When shelter-in-place is implemented, sealing windows and doors is a crucial action to take to ensure the safety and effectiveness of the sheltering process. This action helps to prevent hazardous materials, such as toxic gases or airborne particulates, from infiltrating the indoor environment. By sealing these openings, individuals can create a barrier that reduces the risk of contamination and exposure during an emergency.

In contrast, leaving windows and doors open would allow harmful substances to enter the sheltering area, compromising the safety of those inside. Moving to the nearest exit may expose individuals to the hazardous environment outside, and gathering outdoor equipment could also increase the risk of exposure. The objective of shelter-in-place is to minimize exposure to danger and remain secure within a controlled environment, making the action of sealing off entry points essential.