Wet Floodproofing is a method that allows water to enter a structure but also exit a home with minimal damage. This method includes permanent or contingent measures applied to a structure or its contents. Some measures that can be used are flood vents, elevating home equipment like outlets and air conditioning units above Base Flood Elevation (BFE), and using flood-resistant materials in areas of the structure below the BFE.

Chapter 6 of FEMA's Selecting Appropriate Mitigation Measures for Floodprone Structures is a great resource for wet floodproofing measures.