Super El Niño 2026: 9 Home Fixes to Finish Before the Rain

It's 100 degrees in Los Angeles this week. Rain is the last thing on anyone's mind. But the people who track the ocean are worried, and so is the state.

On September 21, 2026, Governor Newsom declared a state of emergency to get California ready for what could be a historic El Niño winter. NOAA's latest advisory gives a greater than 90% chance of a very strong event this fall and winter. The governor's office says there's a 75% chance it reaches historic strength.

El Niño doesn't guarantee a wet winter. The state says so itself. But it raises the odds of strong storms, and a house that's ready costs far less than a house that floods. Here's what we'd fix first, in the order we'd do it.

Key Takeaways

• NOAA's advisory puts the odds of a very strong El Niño this winter above 90%.
• Roofers get booked solid once the rain starts. Inspections now are easier to schedule and cheaper than emergency tarping.
• Most water damage we see starts at a few spots: the roof, the gutters, the downspouts and the ground next to the foundation.
• Burn scar areas and hillsides carry extra risk from debris flows and slides.
• Check your insurance wording now. Many policies have changed their water-damage coverage.

Why This Winter Is Different

El Niño is a warming of the eastern Pacific. It shifts storm tracks. For Southern California, that often means more storms and heavier ones. The state's own warning lists repeated rounds of heavy rain, strong winds, flooding, landslides, debris flows and coastal flooding, especially when storms land at high tide.

It has already started to show up. The state says California has had coastal flooding this year tied to El Niño, as warm-water ocean waves lift sea levels and Pacific hurricanes push big surf onto the coast.

The heat wave you're feeling this week is a separate thing. Forecasters say El Niño isn't what's causing it. But the two together are why contractors are getting calls now, in October, instead of in January.

1. Get the Roof Checked Before the First Storm

Start here. A roof leak at 2 a.m. during a heavy storm is the worst time to find a roofer. In a big rain, crews can only tarp. They can't repair.

Book an inspection if your roof is more than about 12 years old, or if it has leaked before. Look for:

• Cracked, slipped or missing tiles and shingles
• Dried-out sealant around vents, skylights and chimneys
• Rusted or lifted flashing at walls and valleys
• Stains on ceilings or in the attic after the last rain

Hire a licensed roofer, and check the license on the CSLB website. The name on the license should match the name on your contract.

2. Clear Gutters and Downspouts

Dry months fill gutters with leaves, dust and palm debris. When the rain comes, the water spills over the edge and runs down your walls and into the soil by the foundation.

Clean the gutters. Then run a garden hose down each downspout to confirm it flows freely and ends somewhere useful. Water should leave the downspout and move away from the house, not pool at the base.

3. Test Your Yard Drains

Don't assume a drain works because it's there. Run a hose into each drain and see where the water comes out. If it should reach the curb or a drain line and doesn't, you've found a clog or a broken pipe.

Watch for low spots, too. If water collects there after you've watered, it'll collect there in a storm. A crawl space that stays damp is another warning sign. A sump pump or a regrade of the yard can fix problems like that, but you want to know before the rain, not after.

4. Look at Slopes, Retaining Walls and Hillsides

If you live on a hillside, in a canyon, or below a recent burn area, take this one seriously. Saturated soil moves. County and city crews are already clearing sediment from reservoirs and shoring up burn scar areas, but your own lot is your job.

Check for:

• Cracks or leaning in retaining walls
• Weep holes that are plugged with dirt
• Bare slopes with no drainage path
• Cracks in the soil or patio near a slope edge

Anything that looks off needs an engineer's eye. Our retaining wall engineering guide explains when a wall needs a stamped design, and our hillside construction page covers how we build on slopes.

5. Seal Gaps Around Windows, Doors and Penetrations

Wind-driven rain finds every gap. Walk the outside of the house and look at the caulk around windows, door thresholds, pipe and wire entries, and the garage door seal. Dry, cracked caulk is a cheap fix now and an expensive stain on the drywall later.

6. Handle the Trees

High winds and saturated soil bring down branches and whole trees. Have a certified arborist look at any large tree near the house, a fence or a power line. Dead palm fronds should come off before the storms, because they blow off easily and land on roofs and wires.

One note from the arborists: skip the "thinning" and "topping" some crews sell. Both stress the tree and can make it less safe.

7. Have Sandbags Ready, and Use Them Right

Sandbags are a last resort. They're for steering water away from a door or opening, not for stopping a flood. Stack them in rows outside the opening. Many cities and the county hand them out free at fire stations and public works yards, usually with proof of residence. Call ahead before you drive over.

8. Check Your Insurance Now

This one isn't a construction task, but it matters more than most of them. Many insurers have changed their water-damage coverage and added payout caps in recent years. Read the wording. Know your deductible. Ask for a flood insurance quote, because standard homeowner policies don't cover flood.

Also record a video walk-through of every room and email it to yourself. If you ever need to file a claim, that video makes it a lot easier. If you're also watching your wildfire coverage, our FAIR Plan rate guide covers what's changing.

9. Don't Start a Big Exterior Project in the Rain Season Without a Plan

If you were about to open up a roof, a wall or a foundation, talk to your contractor about timing. A good contractor will tell you what can wait until spring, what needs temporary weather protection, and what has to happen now. Opening a roof in December without a tarp plan is how a $15,000 job becomes a $40,000 one.

Planning a bigger exterior job? Our exterior remodeling and structural and foundation teams can tell you what's safe to schedule this fall.

What About Fire-Zone Homes?

Burned hillsides don't absorb water, so heavy rain runs off fast and carries mud and rock. If your home is in or below a recent burn area, flood and debris-flow risk is higher than it looks. Sign up for your county's alerts, know your evacuation route, and talk to a licensed pro about debris barriers and drainage before the storms. And if you're also working on defensible space, see our guide to the new Zone 0 rules.

When to Call a Contractor

Call a licensed contractor if you find any of these:

1. A roof that's old, leaking, or has damaged flashing
2. Water pooling against the foundation
3. A retaining wall that's cracked or leaning
4. A drain that won't carry water away
5. Damp crawl space or musty smell

Get the scope in writing, compare line by line, and confirm the contractor's license and insurance. And plan early. Once storms start, the good crews get booked.

We're a licensed general contractor serving LA, Ventura and Orange County. If you want a second set of eyes on your roof line, drainage or slope before the rain, call 1-866-419-8840 or contact us.

FAQ

How likely is a strong El Niño this winter?

NOAA's Climate Prediction Center says there's a greater than 90% chance of a very strong event this fall and winter. The Governor's office adds that there's a 75% chance it reaches historic strength.

Does El Niño mean a wet winter is guaranteed?

No. El Niño raises the chance of strong storms in California, but it doesn't guarantee any particular storm. That's why the state is telling people to prepare now.

What should I fix first on my house?

Start with the roof, then gutters, downspouts and yard drains. Those four spots cause most of the water damage we see.

When should I book a roof inspection?

Now. Roofers get swamped once the rain starts, and during heavy storms they can usually only tarp a leak, not repair it.

Does homeowners insurance cover flood damage?

Standard homeowner and renter policies generally don't cover flood. Ask your insurer for a separate flood quote, and read your water-damage wording closely.

Where can I get free sandbags?

Many cities and Los Angeles County offer free sandbags at fire stations and public works yards, often with proof of residence. Call your local office first.

This article is general information, not engineering or legal advice. Storm outcomes are uncertain and rules depend on your city and property. Sources: NOAA Climate Prediction Center ENSO advisory, Office of Governor Newsom (Sept. 21, 2026), Los Angeles Times (Sept. 22, 2026), Realtor.com (Oct. 5, 2026).

Serving Los Angeles County, Ventura County, and Orange County. CSLB #1076428. 1-866-419-8840 | info@1smart.build | https://1smart.build