It appears that these people were standing at some sort of sea-wall watching the big waves when one slammed into and crested the wall.
From this picture it appears many may have lived. I pray this is so.
The vehicles may have provided the most very temporary "sheild" until the water lifted them and turned them into battering rams...
This whole sequence of photos is not from the Tsunami but actually from the Qian Tang Jiang River, in Hangzhou, China dated 2002.
http://img.photobucket.com/albums/v47/dallas59/wave2.jpg