Tidal Waves

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Tidal Waves

What is a tidal wave?

A wave that moves up to 200 MPH and is up to 1,000 feet high.

Causes

Hurricane storm surge
Underwater earthquake
Unusual astronomical conditions

Effects

Flooding
Destruction of coastline
Damage to property and homes

Types of Tidal Waves

Tsunamis - earthquakes in the oceans
Storm Surge - caused by hurricanes

Record Tidal Waves in the USA

1900	Storm Surge	Galveston TX	6,000 - 7,000 dead
1946	Tsunami	Hawaii	173 dead
1955	Storm Surge	Northeast USA	187 dead
1964	Tsunami	Alaska	131 dead

Safety Tips for Tidal Waves and Storm Surge

If you are in a dangerous area you should turn off the water, electricity, and gas and quickly go inland.
If they say a tsunami is coming, do not go down to the beach because of the dangerous impact of the wave.
After a tsunami or storm surge hits, all food and water should be checked for contamination before eaten.
All buildings should be checked for gas leaks, and broken electrical wires before anyone enters them.
Listen to T.V. or the radio to see when it is safe to go home, do not leave your safe location until the tsunami or hurricane has passed over.

Facts About Tidal Waves

Facts About Storm Surges

It is really called a tsunami.

They can sweep a heavy truck right off the ground.

Waves can be formed at any time without warning.

They move as fast as 150-200 miles per hour.

A tidal wave can be up to 1,000 feet high.

When the hurricane is near land the waves build up and cause a storm surge.

In a hurricane the storm surge is the most dangerous part.They cause nine out of ten fatalities.

More people are killed in storm surge than killed by a hurricane's wind and power.

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