Staying indoors away from windows and glass doors is the safest action when evacuation isn’t possible. Being inside an interior space reduces exposure to wind-driven debris and shattered glass, which are the main sources of injury in a hurricane. It also keeps occupants in a part of the building that is more likely to remain structurally sound, away from exterior walls. Moving to the roof is dangerous because winds up there are much stronger and can cause uplift or blow debris onto you. Evacuation to the nearest exit would send you outside into the storm, increasing risk rather than reducing it. A supply closet might be cramped and isn’t designed to withstand debris or pressure changes during a hurricane. So, the best approach is to stay indoors in a sheltered interior area, away from windows and glass doors.

In this kind of situation, the most effective notification tells people immediately that there is an active shooter and, if possible, provides the last known location of the shooter. This combination gives clear, time‑sensitive information that lets occupants make quick, practical decisions about what to do next—evacuate along safe routes away from the last seen location or shelter in place when escape isn’t feasible. Merely signaling that an incident is happening can leave people unsure where to go or what to expect, while sharing only the last-known location without confirming an active threat can create ambiguity. Relying on emergency services alone delays guidance that people on the ground need to respond effectively in the moment. So, the most effective approach is to indicate the incident and, if possible, inform occupants where the shooter was last seen.

External natural gas leaks require protecting occupants by moving them to a safer interior location rather than evacuating outside or sheltering in place. Relocating people inside minimizes exposure to the outdoor hazard while keeping exits and clear routes available for responders to operate and for headcounts to be taken. It also allows the safety team to coordinate with utility responders who will shut off the gas and assess the area without people lingering near the exterior plume. Evacuation would push occupants into potentially still-hazardous outdoor air and create unnecessary traffic and exposure, while shelter-in-place isn’t the most suitable approach for an external gas release. Shifting occupants to a safe interior area promptly, with ongoing monitoring and coordination with utilities, best preserves safety until the hazard is contained.

A CO leak is about protecting people from exposure to a toxic gas, so the actions it tests are ways to remove or limit exposure. Evacuation is credited because moving people to fresh air outdoors is the quickest way to reduce inhalation risk. Shelter-in-place is credited when staying inside a secure area with controls on air flow helps minimize exposure rather than venting outdoors, which can be risky if the plume is moving toward the building. Lockdown is credited as a way to control movement and secure the area so occupants can be accounted for and responders can work safely. Quarantine does not fit a CO-release scenario since it targets contagious diseases, not chemical hazards, so it would not receive credit.