Evacuate or Shelter in Place — Making the Right Decision

The decision to evacuate or stay put is one of the most consequential choices in an emergency. Both options can be correct, and both can be fatal depending on the specific circumstances. Neither option is inherently safer; the right choice depends on the nature of the threat, the specific conditions, your household's capabilities, and available resources.

This article provides a practical framework for making this decision — covering the factors that favour each option, the scenarios where each is correct, and how to make the call decisively under stress.

Why This Decision Is Difficult

Both evacuation and sheltering carry risks:

Risk in Evacuation	Risk in Sheltering
Exposure to the threat during travel	Extended exposure if the threat reaches your location
Vehicle accidents (emergency driving stress)	Running out of critical supplies
Road congestion or blockage	Becoming trapped if conditions deteriorate
Unknown conditions at the destination	Delayed decision-making leading to forced evacuation under worse conditions
Loss of shelter and established resources	False sense of security

Neither choice eliminates risk. The goal is to choose the option with the lower risk profile for your specific situation.

Factors Favouring Evacuation

Evacuation is generally the better choice when:

Factor	Explanation
You have been ordered to evacuate	Official evacuation orders exist for good reasons; follow them
The threat is coming to you	Fire moving toward your area; flood inundating your location; structural failure imminent
Your location is unsafe	Building structurally compromised; gas or chemical exposure
The threat is slow-onset with warning time	Advancing storm, rising flood — you have time to move to safety
A clearly safer destination exists	Family, hotel, evacuation centre is identifiable and reachable
Your shelter is inadequate	Tent, mobile home, or structure not rated for the hazard
The threat is prolonged	Extended power outage in extreme cold with no heating capability

⚠️ Do not delay following an official evacuation order. Emergency management agencies issue evacuation orders when they have information about the threat that you do not. Waiting "to see what happens" when an evacuation order has been issued has led to people being trapped and killed by fires and floods that moved faster than expected.

Factors Favouring Shelter in Place

Sheltering in place is generally the better choice when:

Factor	Explanation
Evacuation routes are compromised	Roads flooded, blocked, or in the hazard zone
The threat is very fast-moving	A tornado has no warning time for evacuation — shelter is the only option
The outdoor environment is the hazard	Chemical, biological, or radiological release — outside is the dangerous place
Your shelter provides superior protection	A reinforced safe room during a tornado is safer than a vehicle
No clear safe destination	Evacuating without a destination and plan is dangerous
You are vulnerable and travel is high-risk	Medical conditions, infants, severe weather conditions making travel dangerous
The threat will pass quickly	A short severe weather event is safer to shelter through than to drive into

Scenario-by-Scenario Guide

Scenario	Default	Conditions That Change Default
Wildfire approaching	Evacuate early	If fire has cut off all routes: shelter in fire-hardened building
Flash flood	Shelter in place (upper floor)	If flood rises to upper floor: roof or evacuation if routes clear
Slow-rising flood	Evacuate before roads flood	Leave early; do not wait for roads to flood
Hurricane / severe storm	Evacuate if in surge zone; shelter if not	Follow mandatory evacuation orders
Chemical plant accident	Shelter in place initially	Follow authority instructions; evacuate if directed
Nuclear incident	Shelter in place initially	See SIP nuclear guidance article
Earthquake	Shelter in place (drop cover hold)	Evacuate after shaking stops if structural damage
Gas leak (indoor)	Evacuate the building	Do not shelter; get outside
Civil unrest	Shelter in place	Evacuate if your specific area is threatened and routes are clear
Extended power outage in winter	Shelter while manageable	Evacuate to warmer location if heating fails and no alternative

The Pre-Decision Framework

Before an emergency occurs, answer these questions:

1. What are the specific hazards in my area? (Flood zones, wildfire risk, industrial facilities, seismic risk)
2. What would require evacuation for each hazard?
3. Where would I go? (Primary and secondary destinations, with contact details)
4. What route would I take? (Primary and alternative)
5. What would I need to take? (Go-bag; essential documents; medication)
6. What would require sheltering?
7. Does my shelter provide adequate protection for the hazards I face?

Answering these questions before an emergency allows you to execute a pre-decided plan rather than making decisions under stress with incomplete information.

Making the Decision Quickly

When an emergency is actively developing:

1. What is the threat? — Identify it as specifically as possible.
2. Is it coming toward me or am I already in it?
3. Has an official order been issued? — Follow it.
4. If no order: which option removes me from more danger?
5. Is evacuation actually possible? — Are routes clear? Do I have a destination?
6. Commit — indecision and delayed action are often more dangerous than either option.

Set a trigger: Identify in advance a specific condition that will trigger evacuation. "If the fire reaches the main road, we leave." This removes the indecision from the moment.

---

Quick Reference

Situation	Action
Official evacuation order	Evacuate — immediately
Threat is at your location (fire, gas)	Evacuate the building
Routes flooded, blocked	Shelter in place; move to upper floors
Chemical/radiological outdoor event	Shelter in place; seal the room
Fast-moving threat (tornado)	Shelter in place; lowest floor interior
No destination identified	Shelter until a plan exists
Indecision	Set a trigger condition before it starts
Vulnerable household members	Plan earlier; act earlier