Storm Season &
Power Outages
KEY TAKEAWAY
Your primary sump pump runs on electricity — which means it stops working the moment the power goes out. Since outages often happen during the same severe storms that cause flooding, a battery backup sump pump is your last line of defense for keeping your basement dry when it matters most.
Storm Season & Power Outages: Why Battery Backup Sump Pumps Matter
Spring and summer in Chicago bring more than warmer weather — they bring heavy rains, severe thunderstorms, and the very real risk of basement flooding. For most Chicago homeowners, a sump pump is the main defense against that water. But here’s the problem: your sump pump runs on electricity, and the storms most likely to flood your basement are often the same ones that knock out your power.
That’s where a battery backup sump pump becomes essential.
What Happens During a Power Outage + Storm
When a severe storm hits, the sequence of events can be fast and devastating:
- Heavy rain saturates the ground around your foundation
- Groundwater rises and begins filling your sump basin
- The storm knocks out power to your neighborhood
- Your primary sump pump shuts down — completely
- With no pump running, water overflows the basin and floods your basement
It doesn’t take long. Depending on how fast water is entering your basin, basement flooding can begin within minutes of a power outage. And the resulting damage — to flooring, walls, furniture, HVAC equipment, and stored belongings — can easily run into the tens of thousands of dollars.
How a Battery Backup Sump Pump Works
A battery backup sump pump is a secondary pump that operates independently of your home’s electrical system. It’s powered by a rechargeable battery (typically a deep-cycle AGM battery) and activates automatically when your primary pump loses power, fails or becomes overwhelmed, or when water rises above the level your primary pump can handle.
The backup system monitors water levels in your sump basin and kicks in seamlessly when your main pump can’t do its job. Many systems also come with alarms and smartphone alerts so you know exactly what’s happening, even if you’re not home.
Why Chicago Homeowners Are at Particular Risk
Chicago’s older housing stock, high water table in many neighborhoods, and notoriously variable spring weather create a perfect storm (literally) for basement flooding. Many homes have a single primary sump pump with no backup — which means one power outage during a heavy rain event can undo years of dry basements.
Areas near the lakefront, river corridors, and low-lying neighborhoods on the North and South Sides are especially vulnerable. But the truth is, any Chicago home with a basement is at risk.
Don’t Wait for the First Flood
A battery backup sump pump is one of the most cost-effective ways to protect your home. It’s far less expensive than water damage restoration — and far less stressful. If you’re not sure whether your current setup includes a backup system, or if you’d like help choosing and installing one, The Plumbing Department is here to help. We serve Chicago homeowners throughout the city and surrounding suburbs.
Call us today to schedule an inspection or installation — before storm season gets the best of your home.