If you are in any of the tsunami evacuation zones (red, orange or yellow) you need to be ready to self-evacuate following an earthquake. If you feel a Long or Strong earthquake: Drop, Cover and Hold. Once the shaking stops, quickly get to a safe location uphill or inland by foot or by bike. DO NOT WAIT FOR AN OFFICIAL WARNING. The first tsunami wave may arrive within 15 and 40 minutes so leave as soon as the shaking stops and go as fast as you can; every step towards safety counts.
Find out if you or your family live, work and play in a tsunami evacuation zone and what to do after a Long OR Strong earthquake.
The map below provides information about evacuation zones. You can zoom into any area and click on a location that will bring up pop-up information.
In you would like to search up an address or print this map head to our interactive mapping tool.
The three evacuation zones are based on a variety of hazard models that aim to include all possible flooding from all known tsunami sources, including 'worst case' rare scenarios for Hawke's Bay for tsunami coming from both a very large local earthquake, or from across the Pacific Ocean.
The Boat Safe Distance Map shows the safe distance for boats to evacuate in a near-source tsunami. In a local tsunami, you will have only 10 minutes on the water to take the correct action. See Boat Safety Map.
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A tsunami is a series of fast traveling waves caused by large disturbances on the ocean floor, such as earthquakes, landslides or volcanic eruptions. In the deep ocean, tsunami pass almost unnoticed, but as they reach shallow coastal waters nearer to land, they change dramatically - a wave of one-to-two metres at sea can grow into waves measuring more than 30 metres in height. A tsunami is made up of very turbulent water – even a small tsunami wave can knock you off your feet.
Near source tsunami: An earthquake will be the only natural warning of a local tsunami – don't wait for official warnings or instructions – there will not be time. It is vital to use your own initiative, as every minute counts. Everyone in all tsunami evacuation zones must move quickly to areas where they are safe – uphill or inland. (To see how self-evacuation saves lives, read about Kamaishi School, in Japan).
Regional or far source tsunami: If a tsunami is coming from much further out to sea, you will not feel an earthquake and there will be an official Civil Defence warning. Evacuate from the zones (red, orange or yellow) as advised in the warning.
Hawke's Bay is at risk from:
Near-source tsunami: Our biggest is risk is from the Hikurangi subduction zone (sometimes called the Hikurangi Trench), just off our coast – this is New Zealand’s largest active fault. If the subduction zone ruptures in a large earthquake, it may rapidly send a tsunami towards our coast.
Regional and far-source tsunami: Because of New Zealand’s position in the Pacific Ocean, the east coast is also at risk from tsunami travelling from much further away. In this case, you will not feel an earthquake and there will be enough time to get expert advice, issue warnings and organise an orderly evacuation.
For a near-source event natural warnings, like any of those below, will be the only warning of a tsunami, so don’t wait for official warnings, go immediately to high ground or, if the surrounding area is flat, go as far inland as possible. Evacuate all tsunami evacuation zones (red, orange and yellow), if any of the following occur:
If you are in a coastal tsunami evacuation zone and there is a Long OR Strong earthquake don’t wait for an official warning. There will not be time. Go immediately to high ground or, if the surrounding area is flat, go as far inland as possible.
If you are in the water, get out immediately and move to higher ground or inland – staying in the water is very dangerous.
A Long earthquake is one that lasts longer than a minute; a Strong earthquake is one that is hard to stand up in. It is better to err on the side of caution and evacuate if you are unsure.
Everyone in ALL of the tsunami evacuation zones – red, orange and yellow should evacuate, preferably on foot or by bicycle. Check if you are in an evacuation zone here.
Understand what that zone means
All zones (red, orange and yellow) must evacuate if there is a Long or Strong earthquake.
In the case of tsunami coming from far away, providing lots of warning time, specific zones may be asked to evacuate by Civil Defence Emergency Management.
Plan your evacuation route
Walking, running or biking are better than driving, because roads may be damaged in the earthquake or there may be too many cars on the road, causing traffic jams. The aim is for you and your family to be safe. There is a route guide for those who live or work along the Napier and Hastings coastline: Plan your route - it can be difficult to know in which direction it is best to head in some of these areas.
Remember you may have to take this route at night. Know the route, practice it with your family, and have a torch. Aim to have more than one route too, in case you need to change route on the day.
You and your family or flatmates need to plan where you will go and how you will get there. Preferably evacuate on foot or by bicycle – traffic jams in a tsunami are dangerous. Get into the habit of knowing where you can find flat shoes, a torch and your Emergency Grab Bag in the dark, in case you need to evacuate in the night.
1) Check whether you live, work or play in a tsunami evacuation zone here, and determine your fastest routes to safety.
2) Make a plan with your household which includes where you will go and how you will get there. Keep your emergency grab bag in an easy-to-find place.
3) Practice your routes regularly – tsunami hikoi week is a great excuse to encourage family, friends, and colleagues to walk your evacuation route together.
Have grab bags ready for everyone in your household. Include water, essential medicines, lightweight snacks, a torch, copies of important documents and photo ID. Pet food if applicable – remembering you have to carry the bag as you evacuate so don’t make it too heavy. Visit getready.govt.nz for more advice on what to pack.
There will not be time to get expert advice and a large earthquake is likely to damage power, internet, and cell phone systems. There will be very little warning of a tsunami if the earthquake is near our coast (the Hikurangi Subduction Zone).
Every minute will count, and by the time Civil Defence Emergency Management has got a warning out it will be too late. There are more than 30,000 properties within Hawke’s Bay’s tsunami evacuation zones, so getting a ‘door knock’ is not possible.
By the time Civil Defence Emergency Management gets a warning up and you search it on-line, it will be too late. Every minute counts so: Long OR Strong – Get Gone.
Encourage them to work out what emergency supplies they need – in an emergency, they may be stuck at home for three days or more – the getready.govt.nz website has a list of supplies to help you get through.
During an earthquake, remind them to ‘Drop, Cover and Hold’ until the shaking stops.
They may be able to provide you with shelter if you have to evacuate following an earthquake. Ask them and make them part of your plan.
Once you are in a safe place, listen to a radio or search online for information on the situation. Remember, the first tsunami wave may not be the largest. Do not return to any of the tsunami evacuation zones until an official ‘all clear’ has been given.
The zones are used when tsunami come from far away, like from Chile, providing time for warnings. You will not feel an earthquake, and only some zones may be asked to evacuate by Civil Defence Emergency Management.
While vertical evacuation could be an option in some circumstances, you need to be aware the building might not withstand the impact of a tsunami, as it hasn’t been designed for that. You could also be isolated in a building for days before help can get to you, and there is the risk of fire. If you choose to evacuate vertically, you should go to at least the third floor. If your building doesn’t have a third floor, staying is not a good option.
You don’t have to. However, the sticker will remind you, your family, neighbours, community and any visitors that this is a risk and what you need to do to.
Once you are in a safe place, search on radio or online for information on the situation. Remember, the first tsunami wave may not be the biggest and there are likely to be many waves. Wait for an official 'all clear' before returning to a tsunami evacuation zone.
Japan has structures specifically designed for vertical evacuations, and the US has building standards for them. Those include foundations that are very deep and reinforced to a higher standard than most buildings, and an open ground-floor level to allow water to flow through.
While New Zealand adopted building standards for vertical tsunami evacuation structures in December 2020, this is for new especially-designed buildings and so we can’t say that any existing buildings in an evacuation zone are a safe place in a tsunami.
We advise you to leave evacuation zones, making sure you carefully exit any building, while being aware that there may be failing debris, and follow your route to a safe location.
But we understand that there may be some rare situations that require different decisions. They may include that:
While vertical evacuation could be an option in some circumstances, you need to be aware the building might not withstand the impact of a tsunami. You could also be isolated in a building for days before help can get to you, and there is the risk of fire. If you choose to evacuate vertically, you should go to at least the third floor. If your building doesn’t have a third floor, staying is not a good option.
Each option has risks and we cannot advise one over the other. You need to be comfortable with your own choice.
Whatever you decide works for you, we strongly recommend you spend some time putting together an Emergency Grab Bag (one at home and one at work if both are in evacuation zones), and practice the route you would take if you have to leave your building. Knowledge is power: the more you prepare for this now, the better.
Our message for tsunami remains: If you are in any of the evacuation zones and feel an earthquake that is either longer than a minute OR strong enough that it’s hard to stand up, then get to high ground as soon as the shaking stops. If it’s Long OR Strong - Get Gone.
Check the Boat tsunami advice for the appropriate safe distance for boats to evacuate during a near-source tsunami, remembering that if you are out on the water in a local tsunami you only have 10 minutes to make a decision and take action.
Scientists have confirmed the subduction zone could generate severe tsunami from earthquake sizes of Magnitude 8-9. This means in the future we could see tsunami like those in the Indian Ocean in 2004 and in Japan in 2011.
Everyone should be familiar with the Hawke’s Bay tsunami hazard maps which can help residents and councils prepare for the impact of a large tsunami. These maps show the worst case scenarios – a tsunami from a very large 2,500 year return period local earthquake or one coming across the Pacific Ocean. Our risks include destruction of homes, businesses, productive land and infrastructure in inundation zones, along with injuries and loss of life, environmental devastation and the slow process of recovery.
In Hawke’s Bay we have been assessing our coastal hazards from Clifton to Tangoio. Find out more on this website.
In 2015 a project also began studying the Hikurangi plate boundary as the source of earthquakes and tsunami. Find out more on this website.
Several moderate-size tsunami have been observed along the Hawke’s Bay coast in the 160 years or so of written historical record. On several occasions, the lives of Hawke’s Bay people have been threatened.
3 February 1931: the largest earthquake in the Hawke’s Bay’s history, the magnitude 7.8 Hawke's Bay earthquake, initiated a moderate tsunami:
26 March 1947: the worst effects of a tsunami were experienced on the coast north of Gisborne, where the waves were 10 metres high. In Hawke’s Bay, Mahia Peninsula was affected.
Tsunami from far-off locations have caused damaging tsunami surges in Hawke's Bay. The 1868, 1877 and 1960 tsunami generated by large earthquakes in South America have had the greatest impact. The surges lasted several days in each case, the largest of the surges generally occurring within the first 24 hours
Please see our PDF guide below.
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