Dense mangrove habitats reduce the force of waves and reduce the pressure.
Coral reefs may be artificially constructed. these have been shown to reduce the impact of tsunamis.
Better education of residents about evacuation procedures. In conjunction with this, early warning systems need to be devised.
Building settlements further inland and away from the lowest-lying regions also reduce the impact on people" if people do not live there. impact is minimised. This, however, is rarely economically viable.