The Digital Flood Insurance Rate Map (DFIRM) Database depicts flood risk Information And supporting data used to develop the risk data. The primary risk; classificatons used are the 4-precent-annual-chance flood event, the 1-percent-annual-chance flood event, the 0.2- percent-annual-chance flood event, and areas of minimal flood risk. The DFIRM Database is derived from Flood Insurance Studies (FISs), previously published Flood Insurance Rate Maps (FIRMs), flood hazard analyses performed in support of the FISs and FIRMs, and new mapping data, where available. The FISs and FIRMs are published by the Federal Emergency Management Agency (FEMA). The file is georeferenced to earth's surface using the UTM projection and coordinate system. The specifications for the horizontal control of DFIRM data files are consistent with those required for mapping at a scale of 1:12,000.

The Digital Flood Insurance Rate Map (DFIRM) Database depicts flood risk Information And supporting data used to develop the risk data. The primary risk; classificatons used are the 4-precent-annual-chance flood event, the 1-percent-annual-chance flood event, the 0.2- percent-annual-chance flood event, and areas of minimal flood risk. The DFIRM Database is derived from Flood Insurance Studies (FISs), previously published Flood Insurance Rate Maps (FIRMs), flood hazard analyses performed in support of the FISs and FIRMs, and new mapping data, where available. The FISs and FIRMs are published by the Federal Emergency Management Agency (FEMA). The file is georeferenced to earth's surface using the UTM projection and coordinate system. The specifications for the horizontal control of DFIRM data files are consistent with those required for mapping at a scale of 1:12,000.

FEMA (Federal Emergency Management Agency) publishes maps used to make determinations of floodplain status for the purposes of Flood Insurance. FEMA is the originator and repository for this information.

Strategic Direction 2023 (SD23) Measure HE.E.5.a reports the number and percentage of buildings, roadways, and properties whose exposure to high flooding risk have decreased due to City efforts. Flood risk can occur during rain events when creeks overflow their banks (creek flooding) or when the capacity of older storm drains and small channels is overwhelmed (local flooding). The Watershed Protection Department helps reduce flood risk through the implementation of structural solutions (e.g., detention ponds, low water crossing upgrades, floodwalls, flow diversion, storm drain improvements) and non-structural solutions (e.g., property acquisition or "buyouts" of properties with severe flood risk, permanent road closures).

View more details and insights related to this measure on the story page: https://data.austintexas.gov/stories/s/hnnn-h4zz