Sump Pump Failed During a Storm? Do This Now
By Ludwig Family Plumbing · March 18, 2025 · 6 min read
It's the worst-case scenario McHenry County homeowners know too well: a heavy storm rolls through, the power flickers, and the sump pump in the basement goes quiet just as the water table spikes. Within minutes, water is pooling on the floor.
Panic doesn't help, but a clear plan does. Here's exactly what to do — in order — to limit the damage and get your basement back under control.
First: make sure it's safe
Before you step into a flooding basement, stop and think about electricity. Water and power are a deadly combination. If water is near outlets, the furnace, the water heater, or any appliance — and you cannot reach the breaker panel from a dry spot — stay out and call for help.
If you can safely reach the electrical panel without standing in water, shut off power to the basement circuits. Never wade into standing water to reach anything.
- Do not enter standing water near energized equipment
- Shut off basement circuits only if you can reach the panel from dry ground
- Keep children and pets away from the water
Check why the pump stopped
Once it's safe, figure out the cause. The most common storm-time failure is simple: the power is out, so the pump — which runs on that power — can't run. If that's the case and you have a battery backup, confirm it's kicking in. If you don't have a backup, this is exactly why we recommend one for every home in the county.
Other quick things to check: has the pump's breaker tripped? Is the float switch stuck against the side of the pit? Is the discharge line frozen or clogged (a winter problem)? Sometimes a jostled float is all that's wrong.
Slow the water down
While you sort out the pump, you can buy time. If you have a wet/dry shop vac, you can start removing water (empty it well away from the foundation so it doesn't drain right back in). A manual backup — even bailing with a bucket into a utility sink — keeps the level from rising while you wait.
Move anything valuable off the floor and onto shelves or higher ground, but only if you can do it without entering unsafe water.
Document everything before cleanup
This step is easy to skip in the stress of the moment, but it matters for any insurance claim. Photograph and video the affected rooms, the water line on the walls, the pump, and any damaged belongings before you start cleaning up. Keep receipts for anything you buy to manage the flood.
A note on insurance: standard homeowners policies often exclude sump-pump failure and water backup unless you carry a specific rider. Check your policy — and if you're not covered, it's worth adding.
When to call a plumber
Call right away if the water is still rising, the pump is dead and you have no backup, or you're dealing with any sewage or contaminated water. A plumber can restore or replace the pump, extract the water, and — just as importantly — tell you how to keep it from happening again.
Ludwig Family Plumbing answers emergency calls 24/7 across McHenry County. If your basement is taking on water, don't wait for it to get worse.
Preventing the next failure
After the emergency, get ahead of the next storm. The single most effective upgrade is a battery backup sump pump, because our worst floods happen during the exact storms that cut the power. Add a water alarm so you get an early warning, and have your pump tested before spring and fall storm seasons.
If your pump is more than seven to ten years old, replace it proactively. A new pump costs a fraction of a flooded finished basement.
The mistake we see most after a storm failure
After a flood, most homeowners buy the same pump that just failed and call it done. The smarter move is to fix the system, not the symptom: a pump that ran itself to death was usually undersized or fighting a failed check valve, and one that went silent almost always lost power. Replacing like-for-like leaves both causes in place.
When we replace a storm-failed pump, we size it to peak inflow, add a battery backup on a separate power source, install a fresh check valve, and add a water alarm. That combination is what actually survives the next outage — a single new primary pump on the same circuit does not.
The Bottom Line
A failed pump during a storm is stressful, but it's also a clear signal: your basement needs a system built for McHenry County storms, not a like-for-like replacement. Fix the source, add backup, and you turn a recurring emergency into a non-event.
Need a hand from a licensed, family-owned McHenry County plumber? Call (831) 290-4327 — we're available 24/7 — or request a free quote.
How We Can Help
Serving McHenry, Round Lake, Lake in the Hills and all of McHenry County.
Frequently Asked Questions
The most common reason is a power outage — the same storm that raised the water table knocked out the electricity your pump needs. A stuck float, tripped breaker, or frozen discharge line are other frequent causes.
Yes, if you have a properly sized generator and a safe way to connect it. But a dedicated battery backup pump is more reliable because it switches on automatically the moment the power fails — no scrambling in the dark.
If the pit is empty and the pump keeps running, unplug it so it doesn't run dry and burn out, then call us — a stuck float or failed switch is usually the cause, and running dry destroys the motor fast.