Counting local infrastructure loss: a source-aware research note.
A source-aware framework for keeping damage, health costs, response spending, grants, loans, mitigation needs and operating costs separate.
Working research note · not peer-reviewed · checked 28 October 2026. This note proposes a consistent way to describe local critical-infrastructure costs after air-quality events, water emergencies, wildfires, hurricanes and tornadoes. It is an editorial method for comparing public evidence, not a complete damage database or an engineering, insurance, legal or financial assessment.
Why one “cost” number is rarely enough
Disaster reporting often places damage estimates, health-system costs, federal obligations, loans, reimbursement requests, mitigation proposals and recurring operations next to one another. Each can be valid, but they answer different questions. Combining them without scope and status can double-count projects or imply that a budget is a loss.
Use a record for each financial quantity
| Quantity | Question answered | Example in the sources |
|---|---|---|
| Physical damage estimate | What asset loss or repair need was estimated, where and when? | NOAA’s 2024 Helene estimate is event-wide at $78.7B, not infrastructure-only. |
| Health-service cost estimate | What additional service use and cost was modeled or observed for a defined group? | Maryland’s six-day smoke study estimated $2.44M in added encounter costs, with a stated uncertainty interval. |
| Response or suppression cost | What did a named agency spend on emergency operations? | NIFC reports $3.1663B in federal wildfire suppression costs for 2023. |
| Obligation, loan or award | What financing or assistance was committed, and in what form? | North Carolina reported $2.48B in FEMA obligations and $645M in EPA revolving loans after Helene. |
| Reimbursement request | What eligible spending is a public entity seeking to recover? | Los Angeles requested more than $140M for emergency response and immediate recovery in a July 2025 CAO update. |
| Needs or mitigation estimate | What future capital work is planned or proposed? | EPA’s drinking-water and clean-water surveys cover different 20-year scopes; the St. Louis demolition program estimates $40–$45M more is needed. |
| Recurring operating cost | What does it cost per year or per service unit to operate and maintain? | Not available consistently in the sources reviewed for this note; do not infer it from capital needs. |
Keep the minimum fields
- Owner and asset: the agency, utility, facility, network or household group.
- Geography and event: local area, region, disaster name and declared period where stated.
- Source date and observation period: when the source was published and what period its figure covers.
- Financial type and status: estimated, requested, proposed, awarded, obligated, loaned, paid, spent or completed.
- Price basis: currency, nominal or adjusted dollars, and price year when available.
- Uncertainty and exclusions: confidence interval, preliminary status and categories not included.
Recovery spending, reimbursement requests, obligations and loans should record whether money was paid, reimbursed, committed, borrowed or remains pending. A planned allocation is not proof of completed work.
Do not add unlike scopes
NOAA’s event-wide loss estimate and FEMA obligations can refer to the same hurricane while measuring different financial streams. EPA’s $625B drinking-water estimate and $630.1B clean-water estimate have different asset scopes and price years. A utility repair estimate and a federal reimbursement request may overlap. A demolition count in a tornado zone can include properties that were already vacant or condemned before the event. Keep the records adjacent for context, but do not sum them without a defined model that resolves overlap.
What this first pass supports
The reviewed sources give examples across wildfire smoke and health, federal suppression, public-building readiness, water-system needs, utility recovery, roads and bridges, hurricane obligations and tornado demolition. They do not provide a harmonized time series of local operating costs, total insured loss or household loss across all hazards. This note leaves those fields explicitly unknown until source data supports them.
NIFC’s 2025 annual report records 77,850 fires, 5,131,474 acres and 18,385 structures reported destroyed. Its October 28, 2026 year-to-date acreage figure is provisional. These physical-impact measures should remain separate from the $3.1663 billion federal suppression figure for 2023. NOAA’s billion-dollar event-cost series ends with 2024, so later hazard counts must not be presented as an updated NOAA dollar-loss total.
Corrections and next research
We will update this note as agencies publish revised assessments, project completions and audited spending. Send corrections or missing primary sources through the contact page. The related briefings and records are grouped under Air, Water & Disaster Resilience.
Sources and evidence stage
- NOAA NCEI · 2024 Billion-Dollar Weather and Climate Disasters — Event-wide losses; not infrastructure-only.
- North Carolina DPS · Helene recovery update — Obligations, loans, project costs and access milestones.
- U.S. EPA · Drinking-water infrastructure needs — Twenty-year capital-needs estimate.
- U.S. EPA · Clean Watersheds Needs Survey — Different water-system scope and price year from DWINSA.
- National Interagency Fire Center · Suppression Costs — Federal suppression cost series.
- City of St. Louis · Tornado recovery demolition update — Local recovery need and pre-storm vacancy context.
- NIFC · 2025 Wildland Fire Summary and Statistics Annual Report — Annual activity, acres and reported structures destroyed.
- NOAA NCEI · 2025 U.S. climate and weather highlights — Current annual event indicators distinct from NOAA’s final billion-dollar cost series.