Tornado: Immediate Response
You have seconds. Know this before you need it.
At Home:
- Basement or storm shelter: Get below grade. Get under something sturdy. Cover your head with both arms, face down.
- No basement: Lowest floor, interior room (bathroom, closet, interior hallway). No windows. Protect your head.
- Mobile home: GET OUT before the storm arrives. Mobile homes provide no protection from tornadoes. Go to the nearest permanent shelter.
In a Vehicle:
- If a sturdy building is within 30 seconds: get to it.
- If you can safely drive perpendicular to the storm path (not away from it — it may be faster than you): do it.
- If neither is possible: abandon the vehicle, find the lowest ground (ditch), lie flat, protect your head.
Never shelter under an overpass. Never.
Watches vs. Warnings: Act Now or Prepare
Tornado Watch: The conditions exist for tornado development. This is your window to prepare: identify your shelter location, get your shoes on, keep a battery radio handy, move away from windows.
Tornado Warning: A tornado has been confirmed by spotters or radar. You are out of preparation time. Move immediately to your shelter location.
Tornado Emergency: Rare designation from NWS — used for confirmed violent tornadoes (EF-4 or EF-5) with a significant threat to life. If you hear this: maximum urgency.
Shelter Locations Ranked
Best: Underground shelter, storm cellar, safe room (FEMA-rated, installed in home)
Very good: Basement of a reinforced concrete or brick building, under a heavy staircase
Acceptable: Interior bathroom, closet, or hallway on the lowest floor of a wood-frame house, away from windows
Marginal: Interior room of a mobile home — marginally better than being outside, but mobile homes can be completely destroyed by EF-0 tornadoes
Not acceptable: Any room with windows or exterior walls, mobile home, vehicle
The Mobile Home Reality
Mobile homes and manufactured homes are the most dangerous place to be during a tornado — period. NOAA data consistently shows that mobile home occupants account for a disproportionate share of tornado fatalities relative to their population.
A mobile home offers minimal structural protection against even a weak tornado. The standard advice — leave your mobile home for a sturdy structure — is correct and not negotiable.
If your community has a tornado shelter: Know where it is, know the fastest route, and practice the route before storm season. When a tornado warning is issued for your area, you have minutes.
If no community shelter is available: Identify the closest permanent structure (school, church, store, neighbor's basement) and agree in advance that you are going there. Ask permission in advance if necessary.
Post-Tornado Safety
The immediate threat ends when the tornado passes. The secondary threats are where additional injuries and deaths occur.
Structural Hazards
- Do not enter damaged structures. What looks stable from outside may collapse from within. Wait for a structural assessment before entering any building that took a direct hit or near-miss.
- Gas leaks: If you smell gas outside your home, do not enter. Call the gas company from a distance.
- Electrical hazards: Downed power lines may not be visibly arcing. Assume any downed line is live. Keep 100 feet of clearance.
Injury Hazards
- Debris fields contain sharp metal, broken glass, and nails throughout. Heavy footwear is required before moving through debris.
- Dust and debris in the air can contain hazardous materials from damaged structures. An N95 mask if available.
- Contaminated water. Water systems are frequently damaged and contaminated after tornadoes. Do not drink tap water until officials clear it.
Carbon Monoxide
Generators brought into use after power outages are responsible for a significant percentage of post-tornado deaths. See generator safety in winter-storm-guide.mdx — the rules are identical: 20+ feet from any opening, outdoors only.
Sources
Frequently Asked Questions
What is the safest room in a house during a tornado?
A basement or storm cellar is the safest location — get under something sturdy (stairs, workbench) and cover your head. If no basement: an interior room on the lowest floor with no windows — a bathroom, closet, or interior hallway. Stay away from all windows. Protect your head and neck.
Is a highway overpass safe shelter?
No. This is a dangerous myth. Wind speeds are actually higher under an overpass due to the venturi effect. Debris becomes more concentrated and faster. People who have sheltered under overpasses have been killed. The correct response in a vehicle: if a safe building is within 30 seconds, get to it. Otherwise, if the tornado is far away, drive perpendicular to the storm's path.
What is the difference between a tornado watch and a tornado warning?
Watch: conditions are favorable for tornadoes — be alert and prepared to act. Warning: a tornado has been spotted or indicated by radar — take shelter immediately. Warning response time is measured in minutes, sometimes less. Do not wait for visual confirmation.