{"action_steps":["Check whether your home, school, or job is in a mapped dam-failure inundation area.","If you are in that zone, plan the fastest way out of low-lying flood areas.","Move important utilities or belongings higher when possible.","Flood-proof parts of the building that are most exposed if you are in the inundation area.","Learn the local warning and evacuation process because some failures may give little warning."],"at_risk_groups":["People living or working in mapped dam-failure inundation areas.","Equity Priority Community members in the exposed area.","Residents in Central East Oakland, Coliseum/Airport, and North Oakland/Adams Point.","People near hazardous materials facilities inside the inundation area."],"base_priority_score":4,"historical_examples":["Federal disaster: Flood Due to Broken Dam, December 21, 1963 (DR-161-CA).","State proclamation: Bradford Levee Failure, December 9, 1983 (83-05).","No recent dam failure impacting the planning area was identified since the 2021 LHMP."],"key_stats":["Official Priority Risk Index (PRI): 1.6, ranked Low.","Population exposed: 63,194 people (14.3% of the city population).","Buildings exposed: 13,780 (13.1% of city buildings).","Community lifelines exposed: 485.","Total exposed building value: $17,213,821,280; modeled damages in the full-failure scenario: $5,935,343,575.","The plan says nearly 13% of Oakland's building stock is vulnerable to dam failure inundation."],"locations":["Combined inundation areas for Central Dam, Chabot Dam, Dunsmuir Dam, Lake Temescal Dam, and New Upper San Leandro Dam.","Central East Oakland.","Coliseum/Airport.","North Oakland/Adams Point."],"name":"Dam Failure","personalization_notes":[],"personalized_what_this_means_for_you":"If you live or work in a dam failure inundation area, your risk is not everyday flooding. It is a rare but serious event that could force you to get out quickly and deal with road closures, utility outages, and flood damage.","priority_reason":"The LHMP ranks dam failure low because it is unlikely, but the consequences could still be severe in mapped inundation areas. It stays on the app priority list because more than 63,000 people and major lifelines are in the exposure area.","priority_score":4,"real_world_impact":"For people in the mapped inundation areas, this would look like a sudden, dangerous flood that can damage buildings, cut off roads, and disrupt utilities.","risk_level":"Low","slug":"dam-failure","summary":"Dam failure is a low-probability but high-consequence flood hazard. If a major dam failed, water could move fast and cause major damage downstream.","top_risks":["Fast inundation with little or no warning in some failure scenarios.","Major damage to homes, buildings, and infrastructure in inundation areas.","Hazardous materials sites in the flood path could create secondary contamination problems.","Transportation, communications, and safety facilities could be disrupted.","Stream changes, sediment, water pollution, and habitat damage could last after the flood."],"what_could_realistically_happen":"A failure upstream could send floodwater into low-lying areas, damage homes and businesses, close roads, and affect hazardous materials sites. In an earthquake-triggered failure, warning time could be very short or absent.","what_this_means_for_you":"If you live or work in a dam failure inundation area, your risk is not everyday flooding. It is a rare but serious event that could force you to get out quickly and deal with road closures, utility outages, and flood damage.","why_this_is_a_real_threat_in_oakland":"Oakland has mapped inundation areas tied to Central, Chabot, Dunsmuir, Lake Temescal, and New Upper San Leandro dams. The plan identifies large exposure in Central East Oakland, Coliseum/Airport, and North Oakland/Adams Point."}