Yes, the sea withdrawing from the shore is a MAJOR danger signal that means RUN!!!
But the governments there obviously don't educate their people at all about the basic signs and dangers, in a known quake area.
First, the horrendous initial losses. Then, how many more will die from dysentery and cholera and other diseases?
How does an individual send money to help something like that so the assistance actually gets to the people that need it, and not waylaid by greedy pockets? The Red Cross? Others?
Sue