Blog · October 14, 2026 · Missouri
Reading the Clark County Flood Zone Map for a parcel
The zone on FEMA's map affects insurance, building and resale near Medill.
Main page: Clark County, MO GIS & Parcel Viewer (official map link, county facts and neighboring maps).
Platbookmapper is an Amazon Associate. If you buy through an Amazon link on this page, we earn a commission. The link is a product, not the county map.
Before you buy or build near Great River National Wildlife Refuge, pull up the Clark County flood zone map: FEMA's zone label affects insurance, building rules and resale. What this county guide covers: locating a parcel on FEMA's map, decoding A, AE and X, and pairing it with the county CAMAvision map, especially near Great River National Wildlife Refuge.
The Clark County flood zone map: start here
Closer to Alexandria, start with FEMA's Flood Map Service Center: enter the street address, then open the map view for that panel. A tract near Wayland without an address can still be found: zoom in from the nearest road then click the parcel area.
The free map to start with
Your first stop is the Clark County CAMAvision map; it includes each tax parcel around Great River National Wildlife Refuge and Kahoka. Out toward Kahoka, enter a street address, an owner's name or a parcel number, then pick the result to center the map on it. If you're looking near Acasto, the record panel normally shows the owner of record, acreage on the tax roll, the parcel number and sometimes recent sales.
How land is described here
Missouri uses the Public Land Survey System, so rural legal descriptions near Wyaconda cite section, township and range. A standard section is about one square mile, roughly 640 acres, and a township holds 36 of them, though corrections make some sections near Acasto odd-sized. Copy the legal description from the record for the parcel near Revere when you talk to a surveyor.
Water near Revere
Small streams around Acasto may not have detailed mapping, so ask neighbors about past flooding. Wet ground around Antioch is a separate issue from flood zones; check the National Wetlands Inventory mapper for a first look.
Clark County in a few facts
Kahoka is the county seat, which is where the courthouse records live. You'll also find Alexandria, Revere, Wayland, and Wyaconda, where town lots give way to larger tracts. Roughly 6,641 people live in the county (Census estimate, 2023) on about 505 square miles for land near Kahoka. Clark County dates to 1836, which matters when you trace an old farm's title. Features like Great River National Wildlife Refuge help you orient on the aerial.
Questions to ask before you buy
For acreage around Wyaconda, ask the listing agent about past flood claims before closing; an insurance quote early keeps the budget honest.
Deeds, plats and who keeps them
For a parcel near Acasto, the map is an index, not the title: recorded deeds, plats and easements for parcels in the county are filed with the Recorder of Deeds. With a lot near Wyaconda, have ready the document number listed on the parcel record to skip a name search.
What the map can't tell you
The acreage figure is an estimate; just a licensed surveyor establishes the real boundary for a parcel near St. Francisville. For a tract near Luray, owner names and values update on a schedule, so a deed recorded last month might lag behind.
Taking the map into the field
The parcel map usually runs in a mobile browser, handy when you're parked on a road near Wyaconda, though signal can drop in rural spots. A saved image of the lot near Acasto and its lines keeps working without signal.
Reading A, AE and X
For land near Kahoka, zones beginning with A or V mark the Special Flood Hazard Area, which FEMA defines as a 1% annual chance of flooding. For a parcel near Anson, shaded Zone X is moderate risk, between the 1% and 0.2% annual chance floods; unshaded X means minimal mapped risk.
Lining it up with the parcel map
FEMA doesn't draw property lines, so check the Clark County CAMAvision map too to confirm you have the right parcel near Medill.
Who handles what
Anything recorded against property around St. Francisville come from the Recorder of Deeds, often with an online index. Building or septic questions for a lot near Kahoka go to planning, building or health offices, and the answer depends on jurisdiction.
Insurance, lenders and building
If a building sits in a Special Flood Hazard Area and the loan is federally backed or regulated, the lender will require flood insurance in communities in the NFIP, which applies near Anson as much as anywhere. New construction in a floodplain near Great River National Wildlife Refuge usually means extra permit review; ask the local floodplain administrator before you plan.
Frequently asked
Is Zone X safe from flooding in Clark County?
Around Revere, shaded X is moderate risk and unshaded X is minimal risk, and floods still happen outside high-risk zones.
What is the difference between Zone A and AE in Clark County?
AE is a Special Flood Hazard Area with a published base flood elevation, so builders near Anson design to that elevation.
Is flood insurance mandatory near Anson?
Short answer: lenders generally require it for buildings near Kahoka in a Special Flood Hazard Area when the loan is federally regulated or insured; elsewhere it's optional.
What is a LOMA for land near Anson?
For most people, FEMA's LOMA process is the usual route when a building near Medill sits above the base flood elevation; a surveyor's elevation data supports it.
Can I use the viewer in the field near Great River National Wildlife Refuge?
If the land is near Kahoka, most viewers run in a mobile browser; screenshots help offline.
Open the official Clark County, MO parcel map See it in the Platbookmapper directory
Not a survey. County GIS and tax parcel maps are assessment and planning layers. They are not a substitute for a recorded plat, deed, or licensed survey, especially for fences, setbacks, or boundary disputes.