What a Super El Niño Winter Means for DFW Homes:
Plumbing, Air and Electric

TL;DR NOAA expects a strong to very strong El Niño through early 2027, which raises the odds of a wetter winter in Dallas-Fort Worth. After the 2026 drought, that rain can shift clay soil under slabs and sewer lines and overload sewers, and a hard freeze is still possible. A check of drains, heating and backup power before December covers the biggest risks.

El Niño raises the odds of a wetter, cloudier winter in Dallas-Fort Worth. It doesn't promise a storm, and it doesn't rule out a hard freeze.

NOAA's Climate Prediction Center has an El Niño Advisory in effect. Its October 8, 2026 update put the chance of a strong to very strong El Niño through January-March 2027 at greater than 83%, with high odds of the strongest El Niño since at least 1950. NOAA's winter outlook favors wetter-than-average conditions across the South from December through February.

Texas history points the same way. In past moderate to strong El Niño winters, Texas averaged 130% to 160% of normal rainfall in November and December, according to NOAA. During the last super El Niño, CoCoRaHS volunteer gauges in Dallas, Collin and Denton counties caught roughly 7 to 12 inches of rain from December 2015 through February 2016.

Fewer Arctic blasts isn't the same as none. During the 2009-10 El Niño winter, DFW Airport recorded 12.5 inches of snow in 24 hours on February 11-12, 2010, an all-time record, and snow-loaded tree limbs knocked out power across the area, according to the National Weather Service. In January 2024, during another strong El Niño, DFW Airport stayed at or below freezing for 89 straight hours.

The rain is arriving after one of the driest, hottest summers DFW has had. DFW Airport went 67 straight days without measurable rain, from July 16 to September 20, 2026, tied for the second-longest dry streak on record, according to the National Weather Service in Fort Worth. By mid-September, the airport had also logged 49 days at 100 degrees or hotter, including a record 12 in September alone.

That matters because of what's under North Texas homes. Much of DFW sits on Blackland Prairie clay, an expansive soil that shrinks and cracks as it dries out and swells as it takes on water, according to Texas A&M AgriLife. All summer, that clay pulled away from slabs and buried pipes. Heavy winter rain makes it swell back unevenly, and that second shift is when joints weakened by the drought tend to give.

A wet winter on dried-out clay can move the ground your plumbing sits in. Our guide to why a wet winter after a drought can crack slab pipes and sewer lines

A wet El Niño winter can move the ground under your pipes, push stormwater into your sewer line and, if a cold snap comes, freeze exposed pipes.

• Shifting soil under slabs and sewer lines: Swelling clay can crack supply lines under the slab and separate or sag older cast iron and clay sewer lines. Watch for a warm spot on the floor, a water bill that won't come down or several drains slowing at once. Our slab leak warning signs guide covers the rest.
• Sewer backups in heavy rain: Rain gets into sewer lines through cracked pipe, root-damaged joints and broken or missing cleanout caps, and it backs up the lowest drain in the house first. Why drains back up when it rains explains how to find where the water is getting in.
• A freeze can still happen: Outdoor faucets, irrigation lines and exposed pipes still need covering when a hard freeze is forecast. Our freeze-prep page and how to prevent frozen pipes walk through the steps, and here's what burst pipe repair involves if one splits.

Chris Woolbright, VP of Plumbing at Baker Brothers, says the calls tend to come in a set order: "When a big rain follows a long dry spell, the first calls are usually backed-up drains, with water coming up in a tub or floor drain on the lowest level of the house. Then, over the next few weeks, we start hearing about slab leaks and sewer lines that broke because the ground moved."

A cold, damp winter asks a furnace or heat pump to run long cycles for weeks, often after months of sitting idle. After a summer of record heat, many DFW systems haven't run a full heating cycle since last winter.

Heat pumps work hardest in damp, near-freezing weather, which is exactly the El Niño pattern. That's when moisture frosts over the outdoor coil. Light frost is normal, and so is a defrost cycle, when the unit pauses and may give off a cloud of steam. A coil encased in solid ice isn't normal and needs a technician. Our heat pump ice and defrost guide explains the difference.

For furnaces and heat pumps alike, a fall check catches small worn parts before a cold front finds them.

"When the first cold front comes through, everybody needs heat on the same day, and most of the no-heat calls we get come down to small things, like a dirty filter, a weak igniter or a dirty flame sensor. Change your filter and run your system now, so if something's wrong, you've still got time to get it looked at." - Roger Frosini, VP of HVAC, Baker Brothers

See our heating services and heat pump services, and if the heat does go out, how fast Baker Brothers can get there in a cold front.

Winter storms can knock out power, and the power coming back can do damage of its own.

Ice, heavy snow and wind bring down limbs and lines, as the February 2010 storm showed. When power is restored, the voltage can spike and reach everything wired to the panel at once.

James Sotero, VP of Electrical at Baker Brothers, puts it this way: "Think about everything in your house with a circuit board in it, from your HVAC system to your fridge. When the power comes back after an outage, a surge can hit all of it at once, so we encourage getting surge protection and backup power squared away before storm season hits."

• Surge protection. A whole-home surge protector at the panel covers the whole house, not just a power strip. See whether whole-home surge protection is worth it.
• Backup power. If an outage would leave you without heat or anything else you can't go without, compare standby and portable generators and read how long a whole-home generator can run during a DFW outage.
• Space heaters on older panels. Space heaters draw a heavy load. If your home has a Federal Pacific or Zinsco panel, read why those panels are flagged as a fire hazard before you plug one in for the season.

Most of these take a weekend. The rest take a service visit.

An electrical safety inspection checks the panel, GFCI protection and surge protection in one visit.

Baker Brothers dispatches technicians for genuine plumbing, HVAC and electrical emergencies 24 hours a day, every day of the year. Call 214-892-2225.

Call right away for:

• Sewage coming into the house through a tub, shower or floor drain
• No heat when a baby, an older adult or anyone who can't handle the cold is at home
• Sparking, buzzing or a burning smell from an outlet, switch or the electrical panel

If you smell gas or see fire, leave and call 911 first. A slow drain or a heat pump in a normal defrost cycle can usually wait for a scheduled visit. Our emergency plumbing page covers what happens when you call.

Want one less thing to think about this winter? Family Plan members get HVAC, plumbing and electrical inspections. Schedule yours before the first storm.

Does El Niño mean Dallas won't freeze this winter?

No. El Niño lowers the odds of Arctic outbreaks in North Texas but doesn't rule them out: DFW Airport got a record 12.5 inches of snow in 24 hours in the 2009-10 El Niño winter. Baker Brothers recommends covering outdoor faucets and draining irrigation lines before any hard freeze, El Niño year or not.

How much more rain does El Niño bring to North Texas?

In past moderate to strong El Niño winters, Texas averaged 130% to 160% of normal rainfall in November and December, according to NOAA. For winter 2026-27, NOAA's outlook favors wetter-than-average conditions across the South from December through February.

Will a wet winter undo the foundation movement from the drought?

Not cleanly. Rain swells DFW's clay soil back up, but unevenly, and Chris Woolbright, VP of Plumbing at Baker Brothers, says slab leaks and broken sewer lines from that movement tend to show up in the weeks after a big rain. If you notice a warm spot on the floor or a water bill that won't come down, a Baker Brothers leak check shows whether the plumbing is involved.

Does homeowners insurance cover sewer backups or slab damage?

Often only with added coverage. The Texas Department of Insurance lists foundation and slab damage as optional coverage and lists backup of sewers and drains as a separate item to compare between policies, so check what your policy includes.

When should I get my heating checked before an El Niño winter?

Before the first cold front. Roger, VP of HVAC at Baker Brothers, says most no-heat calls on the first cold day come down to small things like a dirty filter, a weak igniter or a dirty flame sensor, so changing the filter and running the system now leaves time to get a problem fixed.

Should I get a generator before winter?

If an outage would leave your home without heat or anything else you can't go without, decide before storm season. James Sottero, VP of Electrical at Baker Brothers, recommends having surge protection and backup power squared away before storms hit. Baker Brothers' guide to standby vs. portable generators explains the options.

Baker Brothers Plumbing, Air & Electric has served Dallas-Fort Worth homes since 1945, with plumbing, HVAC and electrical service from locations in Dallas, Arlington, McKinney and Keller. Baker Brothers is licensed in Texas for plumbing, air conditioning and electrical work. This article includes guidance from Chris Woolbright, VP of Plumbing; Roger Frosini VP of HVAC; and James Sotero, VP of Electrical.

This article combines Baker Brothers' field guidance from its plumbing, HVAC and electrical VPs with public weather and climate records. El Niño odds come from NOAA's Climate Prediction Center (October 8, 2026 update; NOAA updates the outlook monthly), and the winter outlook from NOAA's October 2026 release. DFW drought, heat and snowfall records come from the National Weather Service in Fort Worth and NWS figures reported by KERA; 2015-16 rainfall comes from CoCoRaHS volunteer gauges; the January 2024 freeze duration comes from The Dallas Morning News. Soil behavior comes from Texas A&M AgriLife, and insurance coverage from the Texas Department of Insurance. No competitor data or pricing was used. Sources accessed November 5, 2026.

• NOAA Climate Prediction Center, ENSO Diagnostic Discussion (October 8, 2026)
• NOAA, El Niño looms large over U.S. Winter Outlook (October 2026)
• NOAA Climate Prediction Center, El Niño: Potential Effects in Texas
• CoCoRaHS, Texas Winter 2015-2016 Rainfall Totals
• National Weather Service Fort Worth, Winter 2009-2010 Snowfall
• National Weather Service Fort Worth, Consecutive Days Without Measurable Precipitation at DFW
• KERA News, North Texas set a new heat record for the month of September (September 14, 2026)
• The Dallas Morning News, Above-freezing temperatures return Wednesday to Dallas (January 17, 2024)
• Texas A&M AgriLife, Blackland Research & Extension Center
• Texas Department of Insurance, Home Insurance Guide and Homeowners Policy Comparison Worksheet
• Baker Brothers, Does Homeowners Insurance Cover Leak Detection and Slab Leaks in Texas?
• Baker Brothers, Family Plan
• Baker Brothers, El Niño winter series: wet winter after the drought, why drains back up when it rains, heat pump ice and defrost