Finding The Bfe For Zone A My Home Is In A Flood Plain. It Is Listed As Flood Hazard Zone A4 BFE=82. What Does This Mean For Me And Flood

My home is in a flood plain. It is listed as Flood Hazard zone A4 BFE=82. What does this mean for me and flood - finding the bfe for zone a

Concerns have been voiced to buy with the bank on the amount of insurance against flooding because it is so expensive. I want to only learn, but it is very confusing.