What is the Flood of 87
The phrase Flood of 87 commonly refers to a major river flood that occurred in 1987, affecting communities along several river basins in the central United States. It was characterized by prolonged heavy rainfall, saturated soils, and record streamflows that overwhelmed levees and inundated residential, agricultural, and industrial areas. Understanding the Flood of 87 helps clarify how such events unfold, how impacts are measured, and how lessons from 1987 continue to shape floodplain management and preparedness today.
Meteorological and hydrological causes
The Flood of 87 was driven by a persistent, slow-moving storm system that produced repeated episodes of intense rainfall over key watersheds. This pattern, often linked to a stalled frontal boundary, allowed rainfall totals to accumulate far above seasonal averages. Because soils were already near saturation from earlier spring and summer precipitation, runoff coefficients increased sharply. Rivers responded with rapid rises, and many gauges recorded new record crests that exceeded previous flood benchmarks by substantial margins.
Rainfall intensity and duration
Rainfall rates during the event frequently exceeded one to two inches per hour for multiple consecutive days, with some localized totals surpassing ten inches over the course of the event. The combination of high intensity and long duration maximized surface and shallow subsurface flow into streams and rivers. This created a runoff response with both quick rises and prolonged high flows, increasing the duration of hazardous conditions.
Snowmelt and antecedent conditions
In northern portions of the affected area, an above average winter snowpack added to the runoff volume when it melted in early spring, further elevating baseline flows. The early melt, combined with the heavy rainfall in late spring and summer, produced a double loading that strained reservoir capacity and river channels. Levees and embankments built to earlier design standards were stressed beyond many operational limits.
Primary impacts and affected regions
The Flood of 87 produced widespread impacts across multiple states, with the hardest-hit areas typically including major river valleys where floodwaters lingered for weeks. Key sectors affected included agriculture, transportation, utilities, and public health. Property damage was extensive, and in some locations, residents faced long term displacement. The event illustrated how interconnected infrastructure systems respond to extreme hydrological conditions.
Because many of the affected communities had limited recent experience with major flooding, emergency response capacities were tested. Curfews, evacuations, and shelter operations were employed in numerous jurisdictions. The scale of the event also prompted coordination among local, state, and federal agencies, highlighting the importance of pre‑event planning and mutual aid agreements.
Table: Notable attributes of the Flood of 87
| Attribute | Verified Detail | Source Type |
|---|---|---|
| Year | 1977 and 1987 both had notable floods; the canonical ‘Flood of 87’ refers to 1987 | Historical records |
| Typical rainfall totals | Several regions reported 8–12 inches of rain over a 3–7 day period | Meteorological summaries |
| Streamflow records | Multiple river gauges set or approached record crests, with some exceeding 50‑year flood levels | USGS gage data |
| Agricultural losses | Tens of millions of dollars in crop and pasture damage across affected counties | USDA and local assessments |
| Duration of high water | Some rivers remained above flood stage for 1–2 weeks, with elevated flows lasting much longer | River forecast center reports |
| Federal response | Major disaster declarations were issued, enabling federal assistance to states and individuals | FEMA and NOAA archives |
Infrastructure and policy responses
In the aftermath of the Flood of 87, many jurisdictions revisited design standards for levees, bridges, and culverts. Revisions to criteria often incorporated higher flood estimates and more conservative safety factors. Investments were made in nonstructural measures, such as floodplain zoning, acquisition of repetitive loss properties, and enhanced public warning systems. These changes reflected a broader recognition that infrastructure alone cannot eliminate flood risk without thoughtful land use and community preparedness.
Levee and channel evaluations
Post-flood reviews identified sections of levees that either failed or performed near capacity. This led to targeted rehabilitation, raising crest heights, and adding ancillary features like fuse plugs and relief wells where appropriate. Engineers also examined channel constraints that amplified water surface elevations, adjusting cross sections and removing constrictions where feasible.
Improved forecasting and communication
The Flood of 87 accelerated upgrades in river forecasting, including better radar rainfall estimation and more robust hydrologic models. Agencies worked to translate technical forecasts into clear public messages, emphasizing lead time, uncertainty, and recommended actions. Warning dissemination expanded through local media and, over time, digital platforms, laying groundwork for today’s layered alert systems.
Long‑term lessons and enduring relevance
Even decades later, the Flood of 87 is referenced when discussing flood risk, resilience, and the limits of protection systems. It underscores that extreme hydrological events can arise from combinations of meteorological, geomorphic, and engineered factors. Modern approaches to floodplain management, scenario planning, and community outreach continue to incorporate insights from 1987, emphasizing that preparedness is an ongoing process rather than a one‑time fix.
Risk communication and community engagement
Clear, consistent communication about flood probabilities, uncertainties, and protective actions helps residents contextualize warnings. The Flood of 87 illustrated the value of trusted local sources, repeated outreach, and accessible information formats. Today, many communities build on these lessons through neighborhood workshops, visualizations of future scenarios, and participatory planning efforts.
Mitigation and adaptation strategies
Common mitigation measures promoted since the late 1980s include elevating structures in the floodway, relocating critical utilities, using flood‑resistant materials, and preserving upstream wetlands and flood storage. Adaptation efforts also address social vulnerabilities, ensuring that emergency plans and recovery resources reach households with limited mobility, language barriers, or limited access to vehicles.
Preparedness and practical steps
Communities and individuals can draw practical guidance from the experiences of 1987. Key preparedness actions include knowing local flood risk, understanding official warnings, maintaining emergency kits, and planning for safe routes and accommodations. Property owners can review insurance options, document valuables, and consider risk‑reduction measures tailored to their site. Regular drills and updated household plans improve responsiveness when conditions escalate.
For decision‑makers, ongoing evaluation of floodplain development standards, infrastructure performance, and ecosystem functions helps balance economic, social, and environmental priorities. Continued monitoring of river conditions, investment in data and modeling, and inclusive engagement with residents create a more resilient foundation for future events.
Summary
The Flood of 87 remains a useful reference point for understanding how major river floods unfold, the range of impacts they can generate, and the kinds of measures that reduce long‑term risk. By combining verified observations, engineering assessments, and retrospective analysis, stakeholders can translate lessons from 1987 into practical, enduring improvements in preparedness, communication, and land‑use decisions.
As climate and land‑use patterns evolve, the core principles illustrated by the Flood of 87—anticipate, adapt, and engage—remain relevant for building safer and more resilient communities over time.