The first concept of emergency management began during the Truman presidency in 1948 & 1949. This was the year that the USSR exploded its first nuclear device and also the year the Korean Conflict began. In 1949 the Truman presidency established the Federal Civil Defense Act and the Defense Production Act in 1950. The Disaster Relief Act for natural nad man-made disasters was also passed in 1950.
In 1958, the Federal Civil Defense Act was amended to federal matching funds (50/50) for personnel and administrative expenditures for civil defense preparedness. During the Kennedy Era, civil defense was elevated to a national perspective.
In the 1970's the civil defense program was expanded to include natural disasters. President Carter formed by Executive Order the Federal Emergency Management Agency (FEMA) to assist in responding to disasters both natural and man-made. The 1980's brought the "Comprehensive Emergency Management" concept. All hazards are analyzed and phases managed.