Engineered PreparednessPrepare with Purpose
Sign in
Threats  /  Tsunami

Tsunami

Coastal and fast. Knowing your zone, your high ground, and the minutes you would actually have.

ScopeRegionalCauseNaturalDriven byLocationImpactMajorLikelihoodRare
Tsunami
Why it matters

What Tsunami would mean for you

Three numbers decide how important Tsunami is to your preparedness planning. Impact and Likelihood are general baselines. Vulnerability depends on how prepared you are for this threat.

ImpactMajor8/9
NegligibleCatastrophic

On low coastal ground a tsunami is unsurvivable without immediate high ground - a devastating, fast-moving Impact - but it strikes a defined coastal strip while the wider region stays intact to help, so recovery, though it can take years, is real: a major event rather than a permanent, unrecoverable collapse.

LikelihoodRare2/9
RareFrequent

Only a handful of coastlines are meaningfully exposed, so the Likelihood is low for nearly everyone.

VulnerabilityNot rated
NegligibleCatastrophic

This number is yours. It measures how hard Tsunami would actually hit your household given what you already have in place. Rate it in Threat Planning — then all three multiply into your personal threat rating.

Rate it in Threat Planning →

General baselines — How we rate threats →

Be ready

Preparing for Tsunami

Concrete moves that lower your Vulnerability. Add any of them and we'll track it as an action on your threat list.

Add to my threat list
Know if you're in an inundation zone and where high ground is.
Treat strong coastal quakes as your natural warning - move immediately.
Pre-plan and walk your evacuation route on foot.
Sign up for tsunami alerts if you're coastal.
Learn more

Articles on Tsunami

Primer
Threat Analysis·7 min read

Your tsunami survival is measured in minutes and vertical feet — nothing else

A rare threat with a brutal simplicity: for an exposed coast, preparedness is a pre-walked route to high ground and the discipline to move on the shaking, not the siren.

Read it →
See it on the map

Tsunami where you live.

Coastline exposure weighted by recorded run-ups and the faults offshore.

Loading the map…
Lower
Higher

A national view — this is one of 410+ layers in Area Recon. Open it to zoom to your address, then add the hazards, infrastructure, terrain and resources around you, and read the real numbers for your county.

Explore in Area Recon →
Act on it

Tools for Tsunami

Tool

Threat Planning

Rate this threat, rank it, and build its plan.

Tool

Tsunami Inundation Sim

How far inland the water reaches, and how fast.

Tool

Earthquake Shaking Sim

Model the shaking where you actually live.

Related threats

Other threats often prepared for with this one

Natural

Tornado

PossibleMajor
Driven byLocation
Natural

Flooding

PossibleMajor
Driven byLocation
Natural

Extreme Heat Wave

PossibleMajor
Driven byLocation

Make Tsunami part of your plan

Add it to your personal threat list, score it for your own household, or pull the real hazard data for your county.

Add to my threat listRun my county reportBrowse all threats