Tsunamis can be very, very bad.

The 2004 Boxing Day tsunami killed over 230,000 people in Thailand, Sri Lanka, and Indonesia.

Below are some rules of what to do before, during, and after a tsunami.

Understand the risks:A tsunami could hit any coast, but some places are more vulnerable than others.

Research community evacuation plans:Some communities have tsunami evacuation plans for the public.

Learn what they are.

Be aware of multiple notification systems.

Download the FEMA app:FEMAs app is available on both iOS and Android.

It provides real-time alerts for tsunamis and other disasters, tips, shelter locations, and more.

Plus, its free.

The basic rule: Find the quickest way to get to higher ground.

Get flood insurance:If you live near the coast, insure your house for flooding.

Regular home-owner insurance generally doesnt cover flood or earthquake damage.

These are the ones where recognizing the signs of an approaching disaster could preserve your life.

Earthquake: If a tsunami is generated close by, your first sign might be feeling the earthquake.

Dont wait to be told.

If youre wrong, at least you practiced your escape route.

Rapidly receding water:Watch for rapidly receding ocean water that goes back further than youd expect.

Do not stare at the ocean receding while wondering what is happening.

Do not collect fish.

Either way, you should run.

A tsunami is on its way…what now?

Theres a tsunami coming!

over your shoulder as you run.

If you are in a harbor, then go inland.

Do not touch it, drink it, or swim in it.

Dont go near damaged buildings:Staying away from unstable structures is a good rule for any situation.

Be sparing with the cell-phone usage: Cell phone networks can get bogged down during disasters.

Send texts or use social media to let people know youre OK. Only call for emergencies.