The Diva has been involved in emergency management work since before 1979, which is the year that FEMA was formed. I remember that the driving force behind its formation was pressure by a group of governors who met with President Carter and asked him to do something to make the process of obtaining federal help/assistance for major disasters easier. At that time, a governor would have to approach at least 5 federal agencies to get the assistance needed to cope with a major disaster.
In my opinion, before abolishing FEMA, and the other components of the Dept. of Homeland Security, Trump Administration officials should carefully weigh alternatives.