Christchurch and Banks Peninsula residents who live or work near waterways or the coast are being encouraged to find out if they are in a tsunami evacuation zone.

Tsunami evacuation zones have been updated to reflect new tsunami modelling.

Head of Civil Defence and Emergency Management Rob Orchard said “modelling indicates significant damage could be caused by flooding from a distant or regional source tsunami.”

“In some scenarios, the modelling shows that we could get flooding further inland than previously thought.”

“We are working with affected communities to help guide them with their tsunami evacuation planning, but I would really encourage everyone to go onto the Council website and check whether their property or their workplace is in a tsunami evacuation zone.”

The website has an interactive property search function that allows you to see which evacuation zone, if any, your property is in. It also has advice about what steps you should take to prepare for an evacuation.

In Christchurch and Banks Peninsula there are three main evacuation zones – the red evacuation zone , the orange evacuation zone, and the yellow evacuation zone.

The red tsunami evacuation zone is the area that is most likely to be affected by a tsunami. It includes estuaries, rivers, beaches and harbours, where a tsunami of any size could cause strong currents and surges in the water.

The orange tsunami evacuation zone covers areas on land that could be flooded in the event of a large tsunami.

The yellow zone is an area that is least likely to be affected by tsunami, but could be flooded or isolated in a very large tsunami.

“If you are in a tsunami evacuation zone, it is important that you find out what you need to do in the event of an evacuation and start putting a plan together’’

Mr Orchard says while there is likely to be some warning of a distant or regional source tsunami hitting the coastline, there is likely to be very little warning of a local source tsunami.