Also, I wish that other words could be found than "biblical disaster" for this event, but it seems regrettably to be apt, as in this report from the Washington Post (registration required):
Within minutes, the beach and the area behind it had become an inland sea that rushed over the road and poured into the flimsy houses on the other side. The speed with which it all happened seemed like a scene from the Bible, a natural phenomenon unlike anything I had experienced.Beyond our words, thoughts, and wordless prayers, we can give concrete help. Suggestions from the Red Cross are found here.
As the waters rose at an incredible rate, I half expected to catch sight of Noah's Ark.
Instead of the ark, I grabbed a wooden catamaran that the local people used as a fishing boat. My brother jumped on the boat next to me. We bobbed up and down on the catamaran as the water rushed past us into the village beyond the road.
UPDATE: More ways to help are found here and here.