A tsunami is a series of large, powerful waves that can approach the shore as fast as 160 kilometres per hour. These waves can cause widespread damage when they come ashore.
Tsunamis are most often caused by earthquakes, but can also be caused by landslides and volcanic eruptions. A warning sign that a tsunami is coming is a rapidly falling or rising tide.
Tsunamis are rare, but serious events. While many areas of coastal BC may be threatened in the event of a tsunami, it is generally accepted by scientific and technical experts that the Lower Mainland is a low-risk area.
How to prepare
Our coastal communities are divided into five tsunami notification zones. Knowing your zone will help when a Warning, Advisory or Watch is issued for your area.
Make a plan and emergency kit so you can survive on your own for a minimum of 72 hours:
What to do during a tsunami
- If you feel a strong earthquake, DROP, COVER and HOLD ON. Once the shaking stops, take your grab-and-go bag and move to higher ground immediately.
- If you are near the coast and see a sudden rise or fall of the ocean or hear a roar (like the sound of a jet engine), take your grab-and-go bag and move to higher ground immediately.
- Once on higher ground, stay there. Tsunami waves can last several hours; the first wave is not always the largest.
- Listen to local media and follow instructions from emergency officials. Wait for the "All Clear" before assuming the event is over.
