The Local Hazard Mitigation Plan and the Comprehensive Plan: When the Plans Finally Talk
Part 5 of 5 in our August series on Public Safety and Hazard Mitigation in the Comprehensive Plan.
In most cities and counties, the Hazard Mitigation Plan and the comprehensive plan live in separate binders — prepared by separate offices, often in separate places, by decisionmakers who don’t know each other, let alone talk to one another.
That’s not an exaggeration. It’s the ordinary reality of local planning in rural America. The comprehensive plan is prepared by the planning department — or more often, by a planning consultant hired for the project — with input from elected officials, stakeholders, and the public. The Local Hazard Mitigation Plan is prepared by the emergency management office — or by a state agency, or by a regional council, often covering multiple counties at once — with input from a different set of stakeholders and a different set of federal requirements. The two documents are updated on different cycles, stored in different offices, and consulted by different people for different purposes.
The result is a planning system with a structural blind spot at its center. The comprehensive plan shapes land use for decades — determining where development goes, what gets built where, and how the physical landscape of the county evolves. The hazard mitigation plan identifies the risks that threaten life and property and recommends actions to reduce them. These two documents should be in constant conversation. In most counties, they have never met.
This week, we close the August series by asking what it looks like when they finally do.
What the HMP Is — and What It’s For
Here in the US, the Local Hazard Mitigation Plan (LHMP) is a federally required planning document that identifies the natural and man-made hazards a community faces, assesses the risks those hazards create, and establishes a strategy for reducing loss of life and property over time. Under the Disaster Mitigation Act of 2000, local governments must have an approved LHMP to be eligible for certain FEMA pre-disaster mitigation grants — a significant fiscal incentive for plan maintenance.
A standard LHMP includes four core elements: a hazard identification and risk assessment; a capability assessment that evaluates existing plans, regulations, and programs; a mitigation strategy with specific goals, objectives, and actions; and a plan maintenance process that establishes how the plan will be monitored, evaluated, and updated.
That structure should sound familiar. It is, in essence, the same structure as a comprehensive plan — just applied to a narrower set of questions about risk and resilience. The hazard identification corresponds to the natural resources chapter. The capability assessment corresponds to the implementation section. The mitigation strategy corresponds to the goals and policies. The plan maintenance process corresponds to the amendment procedures.
The two documents aren’t just supposed to be compatible — they are designed to address the same community, the same landscape, and the same future. The fact that they are almost always developed in isolation from each other is a planning failure, not a planning requirement.
Why Integration Rarely Happens
If the LHMP and the comprehensive plan are so obviously complementary, why do they almost always end up in separate binders?
The answer has several layers. Federal requirements drive the LHMP process — FEMA sets the content requirements, the update cycle (every five years), and the eligibility criteria for grant funding. State emergency management agencies administer the program and provide technical assistance. The result is that LHMP preparation tends to follow a federally prescribed template, driven by emergency management priorities, on a timeline set by grant cycles rather than planning needs.
Comprehensive planning, by contrast, is driven by state planning law, local political priorities, and the capacity of the planning department. Update cycles vary widely — some counties update their comprehensive plans every five years, others every ten or twenty. The process is typically led by planners, not emergency managers. And the federal requirements that shape the LHMP — FEMA’s Local Mitigation Planning Handbook, the Disaster Mitigation Act, the Stafford Act — are often unknown to the planners writing the comprehensive plan.
The institutional separation is real. In many rural counties, the emergency manager and the planning director have never sat in the same room to discuss either document. They may work in different buildings, report to different supervisors, and operate on different professional networks. The planning community reads Planning magazine and attends APA conferences. The emergency management community reads emergency management publications and attends IAEM conferences. The two professions have developed in parallel, addressing overlapping problems, without developing a shared language or a shared planning process.
The plans don’t fail to talk to each other because the people who write them disagree. They fail to talk because the people who write them have never been in the same room.
What Integration Actually Looks Like
Integrating the LHMP and the comprehensive plan doesn’t require rewriting both documents from scratch. It requires a deliberate effort to align them — to ensure that the hazard data in the LHMP informs the land use policies in the comprehensive plan, and that the comprehensive plan’s implementation tools are explicitly identified as mitigation actions in the LHMP.
In practice, integration means:
Cross-referencing the documents explicitly. The comprehensive plan should cite the LHMP by name, reference its hazard risk assessment, and identify its mitigation actions that have land use implications. The LHMP should cite the comprehensive plan, identify relevant policies that support mitigation goals, and flag plan updates as opportunities to strengthen the integration.
Aligning update cycles. When the LHMP and the comprehensive plan are updated on different schedules, integration is difficult to maintain. Where possible, communities should coordinate updates — or at minimum, schedule a joint review when either document is being updated, to ensure that changes in one are reflected in the other.
Including planners in the LHMP process. The LHMP stakeholder committee should include the planning director or a senior planner as a standing member — not as an occasional invitee, but as a core participant who can ensure that the mitigation strategy reflects land use realities and that mitigation actions are written in ways that can be implemented through the planning process.
Including emergency managers in comprehensive plan updates. The reverse is equally important. Emergency managers bring hazard knowledge, grant program expertise, and operational experience that most planning departments lack. A comprehensive plan update that doesn’t include the emergency manager in the process is missing critical input.
Translating mitigation actions into land use language. Many LHMP mitigation actions are written in emergency management language that doesn’t translate easily into planning practice. “Reduce flood losses in the XYZ watershed” is a mitigation goal. “Adopt a two-foot freeboard requirement for new construction in the Special Flood Hazard Area” is a land use action that achieves it. The integration work is partly translation work — converting hazard mitigation intentions into the zoning standards, subdivision requirements, and comprehensive plan policies that planners can actually implement.
📋 Planning Takeaway The next time your county’s LHMP comes up for its five-year update, the planning department should be at the table — not as a reviewer at the end of the process, but as a co-author from the beginning. And the next time your comprehensive plan is updated, the hazard risk assessment from the LHMP should be on the table alongside the demographic data and the land use inventory. These documents are describing the same community. They should be written as if they know that.
The Fiscal Case for Integration
Beyond the planning benefits, there is a direct fiscal argument for LHMP-comprehensive plan integration that deserves more attention than it typically receives.
FEMA’s Hazard Mitigation Grant Program (HMGP) and Building Resilient Infrastructure and Communities (BRIC) program provide substantial federal funding for mitigation projects — but only to communities with approved LHMPs and only for projects that are identified in those plans. A community whose LHMP mitigation strategy doesn’t include land use actions — because the planners weren’t involved in writing it — is leaving grant eligibility on the table.
More broadly, the Community Rating System (CRS) discounts we discussed in last week’s article on floodplain management reward communities for exactly the kind of higher-standard planning that results from LHMP-comprehensive plan integration. CRS credits are available for hazard disclosure, flood hazard mapping, open space preservation, higher regulatory standards, and flood preparedness — all of which are more likely to be adopted and maintained when the planning and emergency management communities are working together.
The fiscal math is straightforward: communities that integrate their hazard mitigation planning with their comprehensive planning are more likely to adopt the standards that earn CRS credits, more likely to identify and pursue HMGP and BRIC grant opportunities, and more likely to avoid the development approvals that create future liability. Integration isn’t just good planning. It pays.
Closing the Loop: A Month of Risk-Informed Planning
This August, we’ve built a case for risk-informed comprehensive planning from the ground up.
We started with public safety infrastructure — the argument that response times, service costs, and coverage gaps are land use outcomes, not just emergency management problems. We moved to natural hazards — the data that already exists and the planning decisions that determine how exposed a community becomes to the hazards it faces. We examined man-made hazards — the risks communities approve themselves, one permit at a time, without recognizing them as hazard decisions. And last week, we looked at floods and floodplain management — the most predictable and most preventable of all natural hazards, and the one most clearly shaped by upstream land use decisions.
The thread running through all five weeks is the same: risk is not something that happens to communities. It is something communities create — through the land use decisions that accumulate, year after year, into the physical landscape that the next disaster will encounter.
The Local Hazard Mitigation Plan is the document that is supposed to make that visible. The comprehensive plan is the document that is supposed to do something about it. When they work together — when the planners and the emergency managers are in the same room, reading the same data, writing policies that reinforce each other — communities become measurably more resilient. When they don’t, the binders sit on separate shelves, and the risk accumulates quietly, one subdivision approval at a time.
The Risk-Informed Comprehensive Plan: Complete
Week 1 — Public Safety Infrastructure
Week 2 — Natural Hazards
Week 3 — Technological & Man-Made Hazards
Week 4 — Flooding & Floodplain Management
Week 5 — The Hazard Mitigation Plan ← you are here
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One Risk-Informed Comprehensive PlanThe Bottom Line
The Local Hazard Mitigation Plan and the comprehensive plan are not two documents. They are two halves of the same conversation — one that most counties have never had.
Starting that conversation doesn’t require a grant, a consultant, or a new mandate. It requires the planning director and the emergency manager to sit down together, open both documents, and ask a simple question: where do these plans agree, where do they conflict, and what would it look like if they actually worked together?
That conversation — simple, low-cost, and almost never happening — is where risk-informed comprehensive planning begins.
Risk is not created by disasters. It is created by planning decisions made years before the disaster occurs. The comprehensive plan is where those decisions are made. The hazard mitigation plan is where their consequences are documented. Together, they are the most powerful tools local government has to shape the safety and resilience of the communities they serve.
It’s time to put them in the same room.
The Risk-Informed Comprehensive Plan: How It All Connects
A resilient community is not created by writing another plan. It is created when every plan begins telling the same story.
Questions about integrating your hazard mitigation plan with your comprehensive plan? Drop a comment and we’ll see what we can do,
FURTHER READING
The hazard mitigation planning resources referenced in this article are publicly available and already apply to your community. The resources below will help you go deeper — whether you’re looking for LHMP guidance, integration frameworks, or the fiscal case for risk-informed planning.
Tools & Data
- FEMA Local Hazard Mitigation Planning — FEMA’s overview of the LHMP process, requirements, and resources for local governments. The starting point for understanding what the plan requires and how to make it work.
- FEMA Local Mitigation Planning Handbook — The comprehensive federal guide to LHMP preparation, content requirements, and the integration of mitigation planning with other local planning documents.
- FEMA BRIC Program — Building Resilient Infrastructure and Communities grant program — the primary federal funding source for pre-disaster mitigation projects identified in approved LHMPs.
Reports & Research
- Becoming More Resilient: Integrating Hazard Mitigation Plans into the Comprehensive Plan — Our earlier piece on the integration challenge — the most direct companion to this week’s article.
- Natural Hazard Mitigation Saves: 2019 Report (NIBS) — Every $1 invested in hazard mitigation saves $6 in future losses. The fiscal foundation for the case made in this article.
- FEMA Integrating Hazard Mitigation into Local Planning — FEMA’s guidance document specifically on connecting the LHMP to comprehensive plans, zoning, and capital improvement programs.
Planning Guidance
- Sustaining Places: Best Practices for Comprehensive Plans (APA PAS Report 578) — APA’s framework for integrating hazard mitigation and resilience into long-range comprehensive planning.
- A Complete Guide to Hazard Mitigation Planning: From Risk to Resilience — JC’s own guide to the hazard mitigation planning process — essential background for this week’s topic.
Books
- Disaster by Choice — Ilan Kelman. The argument that disaster damage is the product of human decisions — including planning decisions — not natural events. The intellectual foundation for risk-informed comprehensive planning.
- Planning for Post-Disaster Recovery — APA/FEMA. The bookend to pre-disaster mitigation planning — what happens after the event, and how pre-disaster planning determines post-disaster outcomes.
- The Resilience Dividend — Judith Rodin. A broad examination of how communities build resilience — and why the investments made before disasters occur determine outcomes far more than the response after the fact.
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