Natura l disasters frequently happers in U. S. A. ,frequent earthquakes in the whole western,central and eastern pant, hurricanes in the costal area in the south, and serious drought and floods. Because public security w as paid great attention to, m any to natural disasters didit cause heary casualt ies. For example, 61 d ied in the northern califoria earthquake in 1994 wh ich atlacked populous Los Angeles. This paper discusses the presence of natural hazards in the US and the response m easures that the author believes are keys to the long- term hazard m itigation......