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Tsunami inundation maps

Check the evacuation maps for the city and coastal communities

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Tsunami inundation maps released

19 Dec 2019 - Council released a new Tsunami Inundation Assessment Report and maps showing inundation zones for our region.

The report has been released today on our website following a process of peer review over 2019, the final review by GNS Science initially scheduled for February 2020 was completed this week.

Council as the Civil Defence Emergency Management Group approved publishing the report following confirmation that the information met the required national standard for tsunami modelling. 

The report and maps are based on new research into modelling of a local tsunami generated from a magnitude 8.9 earthquake centered in the Hikurangi Subduction Zone off the East Coast.

Chief Executive, Nedine Thatcher-Swann says a final review was requested to give assurance that the zones that could be affected by a local tsunami meet national guidelines.

“The review of the report ensures we can give our community greater confidence in the information and identify as accurately as possible those areas and people who could be affected.”

The maps will be the basis of a readiness campaign aimed at educating affected communities, residents and businesses to prepare and rehearse evacuation plans.

“As a region we are vulnerable to tsunami of any size at any time, it’s crucial we all have a plan and know what to do based on the new information. As we come together over Christmas this is a good time to talk about evacuation plans and preparing emergency kits.” says Ms Thatcher-Swann.

“We will continue to enjoy our beaches over the summer, but please remember the message – if there’s an earthquake that’s long OR strong, get gone – get to higher ground immediately or as far inland as possible.”

Here's the report and inundation maps
Questions and answers about the inundation zones.

Evacuation routes will be added to the maps as soon as we have them. 

Information on a locally generated tsunami

For a locally generated tsunami - it will be preceded by a very strong felt earthquake (strong that you can hardly stand) or a slow earthquake (one that goes for over one minute)
self evacuation is the only option. Move quickly to higher ground or go inland.

The earthquake will be your only warning and you need to make the decision, if you're in the danger area, whether to go or stay.  

All the evacuation maps have both local and distant evacuation zones on them.  

You only need to get clear of the evacuation areas not miles inland or on top of the highest peak.

If you're on a part of the coast that isn't covered by one of the maps and you're evacuating you should get as far inland or as high as you can within a 20 -30 minute time frame (that's walking quickly not driving).

If you can take a transistor radio you can listen for the all clear or otherwise you should wait 2 hours before returning home - if no tsunami has been generated.

Being prepared for a disaster

It's important that you're prepared for a disaster. Get ready now so that you're better prepared to cope on your own for up to 3 days or more.

As a minimum, everyone needs: 

♦ enough food in your home to last 2-3 days.
♦ know where to get water, if your usual supply is not available.  
♦ alternative lighting - a torch with spare batteries or a wind up one, gas lantern or light-sticks. 
♦ a battery operated or wind up radio and spare batteries - don't forget your car radio as a last resort. 
♦ a first-aid kit, make sure you have essential medications. 
♦ blankets, survival blankets or warm waterproof clothing. 
♦ alternative cooking methods - BBQ or gas cooker. 
♦ to store important family documents where you can get them easily
♦ an emergency plan - where to meet family and how to contact one another if separated.

Useful links

Rain and river levels - check environmental monitoring 
For local road conditions - check our road updates 
For state highway updates - go to NZTA's website(external link) 
For latest weather forecast - go to the Metservice website(external link) 

Find out if you live or work in a Tsunami hazard area and what is a tsunami

We will broadcast over these stations during an emergency: 945 kHz AM - Talkback ZB  |  585 kHz AM - Radio Ngati Porou  |  90.9 FM - ZGFM  |  98.1 FM - Radio Ngati Porou  |  98.9 FM - More FM (Urban Gisborne)  |  90.1 FM - More FM (rural areas)  |  94.9 FM - Radio Live  |  95.7 FM - Turanga FM  |  88.5 FM - Uawa

Review of our CDEM function

An internal review of Tairawhiti Civil Defence and Emergency Management was carried out in December 2018. Here's a summary of the 40 recommendations presented to the CDEM Meeting 9 May 2019(external link)