Quick answer
For water damage in Black Jack, MO, shut off your main valve first, or turn off the well pump breaker if you are on a private well. Report a broken main to Missouri American Water and a public sewer backup to MSD. Then call a water damage restoration company; drying should start within 24 to 48 hours. Missouri insurers must acknowledge your claim within 10 working days.
Do this first
Local water and sewer lines.
Missouri American Water, MSD sewer lines, and the St. Louis County flash flood table are on the Maplewood page.
- Shut off the water. Turn the valve where the water line enters your basement. Water mains in Black Jack belong to Missouri American Water, whose round-the-clock number is listed on our Maplewood page.
- Make it safe and document it. Cut power to wet rooms from a dry spot, photograph the damage, then report the claim.
- Start drying within 24 to 48 hours. Sewage at a floor drain after a storm is usually a full public sewer. Report it to MSD, the Metropolitan Sewer District, then photograph everything before cleanup starts.
The Corps of Engineers counts 16 Coldwater Creek floods from 1957 to 2022. The July 2022 storms led to a federal disaster declaration. Never drive into water over a road.
What to know about water damage in Black Jack
16
Floods in the Coldwater Creek watershed between 1957 and 2022, counted by the U.S. Army Corps of Engineers. The July 2022 flood led to disaster declaration DR-4665.
Source: USACE St. Louis District, Coldwater Creek information paper
18 damaged homes
After the July 2022 storms and flooding, 25 homeowners who listed Black Jack as their city in ZIP 63033 registered for FEMA aid. Inspectors found damage at 18 homes, totaling about $44,805. Most of ZIP 63033 is Florissant, so only Black Jack addresses are counted here. Owners who did not apply are not counted.
Named for three oaks
Black Jack is named for three large blackjack oak trees that stood near Old Halls Ferry and Parker roads. The city incorporated on August 6, 1970.
Source: City of Black Jack, history
Homes in Black Jack
The median home dates to 1971 and about 70% were built before 1980. About 78% are owner-occupied, and none were built since 2010.
Freezes and rain
The NOAA weather station at Lambert airport, about 6.2 miles away, averages 84.9 nights a year at or below 32°F and 26.0 at or below 20°F. In half of years the first freeze comes by November 4 and the last one after April 2. Pipes in outside walls, unheated basements, and crawlspaces are the first to split. It also averages 41.7 inches of rain a year, with about 11.0 days of an inch or more.
Check your ZIP
Flash flood warnings in St. Louis County
The National Weather Service issued 58 flash flood warnings that included St. Louis County from 2016 through November 12, 2026. The year-by-year count is on the Maplewood page.
Cost and insurance in Black Jack
How much does water damage restoration cost in Black Jack?
Most jobs run $450 to $16,000 (Angi). Coldwater Creek or storm water that enters from outside is a flood claim. Finished basements need carpet pad and lower drywall pulled early.
Water removal and restoration in Black Jack
The company that answers handles basement sewer backups, sump pump failures, burst pipes, water heater failures, and storm water at low doors and window wells, plus burst pipes, appliance leaks, drying, and septic backups.
Black Jack questions
Is Black Jack water run by the city?
No. Missouri American Water owns the mains, and the Metropolitan Sewer District runs the public sewers.
Has Black Jack flooded before?
Yes. The Corps of Engineers counts 16 Coldwater Creek watershed floods from 1957 to 2022, including the July 2022 flood.
How do I reach Black Jack City Hall?
Call 314-355-0400 during business hours.
Which ZIP code does this page cover?
The Black Jack part of ZIP 63033. Most of that ZIP is Florissant.
Related guides
Other Missouri towns- Basement floor drain backing up
- Burst pipe, not frozen
- Water coming up through the basement floor
- Missouri insurance claim rules, in plain English
- Frozen and burst pipes: what to do
- Does homeowners insurance cover water damage?
- How long water damage takes to dry
Local phone numbers checked November 2026: