What a "Preliminary" Flood Map Notice Actually Means

If your community has been told its flood map is “preliminary,” that status comes from a specific, dated federal record — not from a local announcement. The determination was published as a Federal Register notice, [Docket ID FEMA-2026-0002; Internal Agency Docket No. FEMA-B-2621] (https://www.federalregister.gov/documents/2026/08/21/2026-17076/proposed-flood-hazard-determinations), issued under section 110 of the Flood Disaster Protection Act of 1973, 42 U.S.C. 4104, and 44 CFR 67.4(a). This article explains what that notice states, where the underlying documents are held, and what it does not tell you.

This original record-reading guide is a general reading aid, not cited evidence. It does not depict a source record; the article text and source links provide the facts.

Key points

• The notice was published under a specific statutory and regulatory chain: “in accordance with section 110 of the Flood Disaster Protection Act of 1973, 42 U.S.C. 4104, and 44 CFR 67.4(a)” (Federal Register, Aug. 21, 2026).
• It carries a formal docket identifier: “[Docket ID FEMA-2026-0002; Internal Agency Docket No. FEMA-B-2621].”
• The public comment window closes on a fixed date: “Comments are to be submitted on or before November 19, 2026.”
• The preliminary map and the current effective map are two separate documents held at two separate addresses, and the notice tells readers exactly where each one lives.
• The notice does not say what the preliminary map shows for any specific address, whether it will become final unchanged, or anything about a property’s flood risk, insurance need, or cost.

The legal basis for the notice

The preliminary determination is not an informal advisory. It is published “in accordance with section 110 of the Flood Disaster Protection Act of 1973, 42 U.S.C. 4104, and 44 CFR 67.4(a)” (https://www.federalregister.gov/documents/2026/08/21/2026-17076/proposed-flood-hazard-determinations). That citation is the statutory and regulatory authority under which FEMA issues Proposed Flood Hazard Determinations notices, and it is what makes the notice a formal step in the map-revision process rather than a preview or courtesy notice.

The docket identifier

Every Federal Register notice of this kind carries a docket number that ties it to the official record. This one is recorded as “[Docket ID FEMA-2026-0002; Internal Agency Docket No. FEMA-B-2621]” (https://www.federalregister.gov/documents/2026/08/21/2026-17076/proposed-flood-hazard-determinations). If you need to look up or reference this specific determination — for example, in correspondence with FEMA or a local floodplain administrator — this docket ID is the identifier to cite.

The comment deadline

The notice sets a fixed public comment period. As published: “Comments are to be submitted on or before November 19, 2026” (https://www.federalregister.gov/documents/2026/08/21/2026-17076/proposed-flood-hazard-determinations). That date marks the close of the formal comment window tied to this specific notice; it does not by itself say what happens to the map after that date.

Two documents, two different addresses

A frequent point of confusion is that “preliminary” and “current effective” maps are not the same document, and they are not stored in the same place. The notice is explicit about this:

“The Preliminary FIRM, and where applicable, the FIS report for each community are available for inspection at both the online location https://hazards.fema.gov/femaportal/prelimdownload and the respective Community Map Repository address listed in the tables below. Additionally, the current effective FIRM and FIS report for each community are accessible online through the FEMA Map Service Center at https://msc.fema.gov for comparison.” (https://www.federalregister.gov/documents/2026/08/21/2026-17076/proposed-flood-hazard-determinations)

In plain terms: the preliminary Flood Insurance Rate Map (FIRM) and, where one applies, the preliminary Flood Insurance Study (FIS) report are held at the FEMA online preliminary-download portal and at a local Community Map Repository named in the notice’s tables. The map and report currently in legal effect — the ones that apply today — are a separate set of documents held at the FEMA Map Service Center. Before acting on anything you read about a flood map, confirm which of these two documents you are actually looking at.

What this article does not answer

This notice, and this article, do not describe what the preliminary map actually shows for any particular address or parcel. They do not say whether the preliminary determination will be adopted as final without changes, or when or how it might change before becoming effective. Nothing here states whether any specific property floods, whether any specific property sits within a Special Flood Hazard Area, whether flood insurance is needed or advisable for any property, or what a flood insurance policy would cost. Readers who need answers to those questions should consult the preliminary FIRM/FIS documents themselves, their local floodplain administrator, or a licensed insurance professional — not this notice alone.

Source links

https://www.federalregister.gov/documents/2026/08/21/2026-17076/proposed-flood-hazard-determinations https://www.govinfo.gov/content/pkg/FR-2026-08-21/html/2026-17076.htm