RealtyTrac‘s 2016 U.S. Natural Disaster Housing Risk Report rates counties for risks of natural hazards, such as hurricanes, wildfires, tornados, earthquakes, or floods. The 3 states whose counties had the highest risk index (high and very high) were California Florida, and Oklahoma. In those 3 states the largest counties that have the most properties at risk for natural disasters were Collier (Naples) and Miami-Dade Counties, Florida; Riverside County (Inland Empire of Southern California) and Santa Clara County (San Jose), California; and Oklahoma County, Oklahoma.
How about the Phoenix metro area and its county (Maricopa)? It is considered to be from moderate to low risk.