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Calabasas Hillside Homes: The Slope Behind Your Backyard Is Sending You Water

Posted by Giovanni Longo on November 5, 2026

By Giovanni Longo, third-generation master plumber and certified Flood Mitigation expert, Flood Brothers Plumbing

Forecast note (as of Nov 5, 2026): NOAA's Climate Prediction Center has an El Niño Advisory in effect and expects a strong-to-very strong El Niño through January–March 2027, with chances remaining above 83% (CPC ENSO discussion, Oct 8, 2026; CPC status update, Nov 2, 2026). The National Weather Service in Los Angeles (AFD 12:43 PM PST Nov 5) keeps dry offshore weather through about Wednesday, a chance of light rain Thursday, Nov 12, then wet and unsettled weather from about Friday, Nov 13 into that weekend, with ensembles showing decent chances of widespread 1+ inch totals though timing and amounts remain uncertain (NWS Los Angeles AFD). NWS San Diego likewise flags a large trough late next week with substantial rain possible but low confidence in the details (NWS San Diego AFD). El Niño raises the odds of a wet winter, but it doesn't guarantee one. Check weather.gov/lox before each storm.

Calabasas homes often back up to open, natural hillsides and terraced yards. That's beautiful in summer. In a storm, the slope behind you becomes a watershed that drains straight into your backyard. We serve Calabasas from our Woodland Hills office next door.

What I watch for in Calabasas

The hillside basics I check on every hill home

Warning signs that mean "leave and call 911": cracks opening in the ground or walls, tilting trees or fences, sudden mud or debris flow, or doors that suddenly stick. A pump doesn't fix a moving slope. Follow evacuation orders from your city or county.

The pump setup for a hillside home

On a hill, gravity does part of the work. Put the pump at the low spot where water collects, usually the garage threshold, a lower patio or a window well. Then run the hose downhill to the street. If the curb sits above the low spot, buy a pump rated for that lift. Full guide: pump, hose and outlet.

Safe when it's set up right: the electrical part

Water and electricity can mix safely only when you set them up correctly. Here's how I set up every pump:

Learn more about our service in Calabasas and about water damage restoration.

Need a hand before or during the storm?

Call or text 855-840-7800. A live person answers 24/7, and we offer same-day service. Flood Brothers Plumbing is licensed, bonded and insured (CA License C36-985487), we've been at this for more than 15 years, and we work directly with your insurance company. If water already got in, see our water damage restoration service: water removal and drying, odor treatment, tarps and board-ups.

Gio's $99 Special

Before the El Niño rains and the holidays, get a sewer mainline snake plus camera inspection for $99. Mention "Gio's $99 special" when you call or text 855-840-7800. Mention the special when booking; valid through 12/31/2026. See Gio's $99 Special.

FAQs

My Calabasas backyard backs up to a hillside. What should I clear?

The brow ditches, swales, terrace drains and retaining wall weep holes. Clear the leaves and soil before each storm.

Is there a Flood Brothers office in Calabasas?

No. We serve Calabasas from our nearby Woodland Hills office, with same-day service.

Can I use my pool pump during a storm?

A pool cover pump or a submersible utility pump works well for deck runoff. Use a tested GFCI outlet.

Who maintains the drainage ditches in my HOA?

It depends on your HOA. Check with them before the storm.