At 8 in the morning, 26th December 2004, a Richter 9 earthquake dislodged the sea floor by 15m to cause the biggest tsunami in living memory.
Five years on and children starting schools don’t remember.
How do you keep populations ready for the next one, when tsunamis might hit only once a century? How do you refine warning systems to be highly responsive when tsunamis can travel a 1000 kilometers in an hour? And how do you maintain the impetus to make defensive planning decisions as memories fade and priorities change?
One group, organized by the UN International Strategy for Disaster Reduction, has been setting up structures, getting the early warning system up and making sure as many people as possible have the knowledge to cope when a tsunami strikes again.