Natural hazards include many geophysical and biological phenomenon that have negative effects on humans. In many cases, natural hazards can be predicted based on meteorological, oceanographic, and geological patterns or physical characteristics. Hazards include extreme rainfall from storms, erosion from waves, and ash from volcanic activity. Owing to the potential of combined factors with varying temporal and spatial scales, sharing expertise among scientists and engineers is especially necessary. Resilient approaches require collaboration among multiple agencies, industry and the community. Effective collaboration includes coordination across geographic regions, levels of authority and sectors of society to ensure that partners understand the impacts of environmental factors on their plans and operations. Resilient approaches preserve, not destroy, barriers against waves and storm surge such as coral reefs, dune systems, mangrove forests, and salt marshes.