By ThePreppersBlueprint.com Editorial Team
You don’t pick shelter-in-place or evacuate the way you pick a favorite. You prepare for both, and the incident itself — plus whatever your local officials are telling you in the moment — decides which one you actually do. One notable exception to waiting for official word is covered below. This page gives you a one-page household worksheet to turn that decision into action: what to do immediately, where the real information comes from, and what to leave alone until the incident is over.
The Short Answer: Prepare Both, Let the Incident Decide
Shelter-in-place means staying indoors and limiting exposure to outside air. Evacuating means leaving the area entirely. Neither is the safer choice in general — each is safer for specific situations, and the situation is set by the hazard and by what local officials are telling you for your specific address. Officials have information you don’t: road conditions, containment lines, flood stage, and the path a hazard is following. If you’re told to shelter in place or told to evacuate, that instruction overrides your own guess.
As a general pattern, not a fixed rule: a hazard with little time to react, where it’s more dangerous to be outside than inside, tends to call for sheltering in place. A hazard that threatens the structure or the area itself tends to call for leaving before it arrives. Treat that as background reasoning, not a category chart — the specific instruction you’re given always wins over this general pattern.
The One Exception: Tsunami Natural Warning Signs
For most hazards, waiting for an official instruction is correct. Tsunamis are the documented exception. If you’re in a coastal area and notice a sudden rise or draining of ocean water, feel strong or prolonged earthquake shaking, or hear an unusual roaring sound from the sea, federal guidance says to move to high ground immediately — before any official warning arrives, because there may not be time for one to come. Ready.gov’s instruction is blunt: “Evacuate: DO NOT wait!”
That’s the one case on this page where natural signs, not an official alert, should trigger you to act.
How to Use This Worksheet
This isn’t a tool for figuring out what kind of alert you just received — this site’s alert decision worksheet walks through that question. This page assumes you already know the incident type and what officials are telling you, and sorts what happens next into three categories: what to do right now, where to keep getting information, and what to hold off on. Fill it out as a household before anything happens, and keep it with your emergency kit.
Immediate Actions
These apply whether you end up staying or leaving, so do them first and sort out the rest after:
- Get everyone in the household into one location so nobody has to be located separately later
- Turn on a battery-powered or hand-crank radio, ideally a NOAA Weather Radio with tone alert, and listen for the actual instruction being given
- Write down whether the instruction is shelter-in-place, evacuate, or neither — don’t rely on memory under stress
- Bring pets inside or into carriers now, before the decision is finalized
- Keep your emergency supply kit within reach; if it isn’t already packed, that’s a separate task to handle before the next alert, not during this one
Information Sources
This decision is made by what you’re actually being told, not by instinct. In order of priority:
- A direct instruction from local emergency management officials, if one has been issued — this overrides everything else on this list
- NOAA Weather Radio and Emergency Alert System or Wireless Emergency Alert text, read literally rather than interpreted
- Natural warning signs, for the tsunami exception above — act on these without waiting for an alert
- Local TV or radio, as confirmation once you’ve already acted on the sources above
Purchases to Defer
An active incident isn’t the time to make consumer decisions, and this worksheet isn’t the place to do it for you. Hold off on:
- A last-minute retail run for gear once a warning is active — that trip itself can put you on the road during the exact window you’re trying to avoid
- Upgrading or replacing kit components that are nice-to-have rather than missing — handle that after the incident, calmly, not mid-decision
- Locking in a destination booking or a major expense before you know whether you’re actually leaving
If the incident shows you a real gap in your kit, add it to your list and buy it once things are back to normal.
What This Page Doesn’t Cover
A few related questions are handled in more depth elsewhere on this site rather than repeated here:
- Classifying the alert you just received — Watch vs. Warning vs. Advisory, mandatory vs. voluntary order — see the alert decision worksheet
- The physical mechanics of sheltering in place — sealing a room, air supply, which room fits which hazard — see shelter-in-place room and supply basics
- The full evacuation process once that’s the decision — routes, go-bags, contacts, returning home — see the household evacuation guide
- Water needs for pets as part of your broader supply plan — see emergency water storage for pets
- Planning for a household member who can’t move quickly or use stairs — see this site’s guide for that situation, since that constraint can change which option is realistic for your household regardless of which one is technically safer
A Few Limits Worth Noting
This worksheet is a planning structure, not a replacement for the instruction you’re actually given during an incident. If local officials tell you to shelter in place or evacuate, follow those instructions over anything general on this page. It also isn’t medical guidance—if someone in your household depends on powered equipment, refrigerated medication, or mobility assistance, build that into your plan with input from your own provider, not a general preparedness article.