Mid-Atlantic City Develops Climate Resilience Plan

Challenge

A Mid-Atlantic coastal city of approximately 28,000 residents was experiencing the compounding effects of sea-level rise, increasingly intense precipitation events, and chronic tidal flooding. The city sits on a low-lying peninsula, with over 40% of its land area below ten feet of elevation. Between 2010 and 2023, the number of days per year with tidal flooding at the city's primary gauge station had tripled — from 12 days to 37 days annually.

The economic exposure was significant. The city's tax base relied heavily on waterfront property, with $4.2 billion in assessed value within the 100-year floodplain and another $1.8 billion in the 500-year floodplain. Repetitive loss properties were consuming an outsized share of the city's NFIP claims budget. Three of the city's five wastewater pump stations experienced saltwater intrusion during king tide events, and the main stormwater outfall system — designed in the 1970s — had insufficient capacity for current rainfall intensity.

The city had adopted a basic climate chapter in its comprehensive plan five years earlier, but it lacked implementation specifics, cost estimates, or a governance structure for execution. Federal and state grant applications had been unsuccessful because the city couldn't demonstrate a systematic vulnerability assessment or a prioritized project pipeline.

Approach

Vulnerability and Risk Assessment (Months 1-6)

We began with a detailed climate exposure analysis using downscaled projections from NOAA's sea level rise scenarios and LOCA2 precipitation data. We modeled three scenarios — intermediate (0.5m by 2050), intermediate-high (1.0m), and high (1.5m) — and overlaid them on the city's GIS infrastructure data, parcel records, critical facilities inventory, and transportation network.

The modeling identified specific infrastructure at risk under each scenario: miles of road subject to chronic inundation, number of structures exposed, critical facilities affected, and economic value at risk. We also assessed social vulnerability using CDC's SVI data, mapping which neighborhoods had the highest intersection of climate exposure and socioeconomic vulnerability — a critical factor for equitable resilience planning and federal grant competitiveness.

We conducted a stormwater system capacity analysis using EPA SWMM modeling, testing the existing drainage network against future rainfall intensities derived from NOAA Atlas 14 and emerging Intensity-Duration-Frequency curves adjusted for climate change.

Community Engagement (Months 3-8)

We designed a three-tier engagement process. Tier one was a community resilience survey distributed to all households, achieving a 22% response rate — unusually high for municipal planning. Tier two consisted of six neighborhood workshops held in the areas identified as most vulnerable, conducted in English and Spanish with childcare provided. Tier three was a stakeholder advisory committee of 18 members including business owners, property managers, environmental advocates, the local NAACP chapter, the fishing cooperative, and school administrators.

The engagement surfaced priorities that technical analysis alone wouldn't have identified. Residents in the historically Black neighborhood adjacent to the city's industrial waterfront were most concerned about combined flooding and contamination risk from a legacy Superfund-adjacent site — a compound hazard that required coordination with EPA and the state environmental agency.

Strategy Development (Months 6-12)

We developed a resilience strategy organized around four pillars: protect (hard and green infrastructure), adapt (building codes, land use, retreat), prepare (emergency management, social systems), and prosper (economic resilience, workforce development). Each pillar contained specific projects with engineering-level cost estimates, benefit-cost ratios, implementation timelines, and identified funding sources.

The strategy prioritized projects using a multi-criteria scoring framework that weighted hazard reduction effectiveness, number of beneficiaries, equity impact, cost-effectiveness, co-benefits (water quality, recreation, habitat), and implementation feasibility.

Implementation Framework (Months 10-14)

We developed a detailed implementation roadmap with near-term (1-3 year), medium-term (3-7 year), and long-term (7-20 year) project sequences. We prepared three grant applications concurrently with strategy development — one FEMA BRIC application, one state resilience fund application, and one EPA water infrastructure application — so the city could begin implementation immediately upon plan adoption.

Results

The city council unanimously adopted the resilience plan, and implementation began within 90 days. Measurable outcomes in the first 18 months included:

• $14.7 million in federal and state grant funding secured across three applications, with a combined benefit-cost ratio of 4.2:1 — the FEMA BRIC application scored in the top 15% nationally
• Living shoreline project completed along 1.2 miles of the most vulnerable waterfront, combining oyster reef restoration with marsh creation — reducing wave energy by an estimated 40-60% during storm events while restoring 8 acres of tidal wetland habitat
• Stormwater system upgrades designed for two priority watersheds, incorporating green infrastructure (bioswales, rain gardens, permeable pavement) that increased system capacity by 35% for the 25-year storm event
• Updated floodplain regulations adopted, including freeboard requirements of 3 feet above base flood elevation (up from 1 foot) and restrictions on new critical facilities in the 500-year floodplain
• Community resilience hubs established at two locations — a community center and a church — with backup power, cooling capacity, and communications equipment
• Managed retreat conversation initiated for 23 repetitive-loss properties through a voluntary buyout program funded by FEMA's Hazard Mitigation Grant Program

Key Takeaways

Lead with data, but center the community. The technical vulnerability assessment was essential for grant competitiveness and engineering credibility, but the community engagement process determined which projects actually moved forward. Resilience plans that skip meaningful engagement produce technically sound documents that sit on shelves.

Design for grant readiness from day one. Every element of the plan — benefit-cost analyses, equity scoring, nature-based solutions emphasis, shovel-ready project descriptions — was structured to align with federal funding criteria. The plan itself became a grant application toolkit.

Address compound and cascading risks. Single-hazard planning misses the most dangerous scenarios. The intersection of flooding, contamination, heat, and social vulnerability in specific neighborhoods required integrated solutions that no single-hazard approach would have produced.

Build governance into the plan. A resilience strategy without a clear implementation governance structure — who leads, who decides, how progress is tracked, how the plan adapts — will lose momentum after the initial political enthusiasm fades.