Official flood hazard maps for the Bend area and Deschutes County are published by the Federal Emergency Management Agency (FEMA). The flood hazard area within Bend is within or adjacent to the banks of the Deschutes River. During the winter of 1996-97 the high water level in some parts of the urban area exceeded the 100-year flood boundary as mapped by FEMA. The city has requested that FEMA re-evaluate the 100-year flood plain within the urban area and adjust their maps as necessary.

The Oregon Department of Geology and Mineral Industries has mapped some faults within the urban area. More information is needed on the type and extent of these faults.