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What to know about the Houston pipeline fire — how it started, pollution impact, and more

Here are some things to know about the situation with the pipeline fire burning just outside of Houston. Photo via Getty Images

A pipeline fire that forced hundreds of people to flee their homes in the Houston suburbs burned for a third day Wednesday, with officials saying they don't expect it to be extinguished until sometime Thursday evening.

Officials said residents who had to evacuate would be allowed to return to their homes starting Wednesday evening.

Authorities have offered few details about what prompted the driver of an SUV to hit an aboveground valve on the pipeline on Monday, sparking the blaze.

Here are some things to know about the situation with the pipeline fire:

What caused the fire?

Officials say the underground pipeline, which runs under high-voltage power lines in a grassy corridor between a Walmart and a residential neighborhood in Deer Park, was damaged when the SUV driver left the store's parking lot, entered the wide grassy area and went through a fence surrounding the valve equipment.

Authorities have offered few details on what caused the vehicle to hit the pipeline valve, the identity of the driver or what happened to them. The pipeline company on Wednesday called it an accident. Deer Park officials said preliminary investigations by police and FBI agents found no evidence of a terrorist attack.

Deer Park police won't be able to reach the burned-out vehicle until the flame has been extinguished. Once the area is safe, the department will be able to continue its investigation and confirm specifics, city spokesperson Kaitlyn Bluejacket said in an email Wednesday.

The valve equipment appears to have been protected by a chain-link fence topped with barbed wire. The pipeline's operator has not responded to questions about any other safety protections that were in place.

Who is responsible for the pipeline?

Energy Transfer is the Dallas-based owner of the pipeline, a 20-inch-wide (50-centemeter-wide) conduit that runs for miles through the Houston area.

It carries natural gas liquids through the suburbs of Deer Park and La Porte, both of which are southeast of Houston. Energy Transfer said the fire had diminished overnight and was continuing to “safely burn itself out” on Wednesday.

Energy Transfer also built the Dakota Access Pipeline, which has been at the center of protests and legal battles. The company’s executive chairman, Kelcy Warren, has given millions of dollars in campaign contributions to Republican Texas Gov. Greg Abbott.

What's being done to extinguish the fire?

Energy Transfer said its crews were working Wednesday to install specialized isolation equipment on both sides of the damaged section that will help extinguish the fire.

Once the equipment is installed, which could take several hours of welding, the isolated section of the pipeline will be purged with nitrogen, which will extinguish the fire, company and local officials said. After that, damaged components can be repaired.

“The safest way to manage this process is to let the products burn off,” Energy Transfer said.

Late Wednesday afternoon, Deer Park officials said repair work on the pipeline to help speed up the process to put out the fire wasn't expected to be completed until 6 p.m. on Thursday. Once finished, the fire was anticipated to be extinguished within two to three hours.

How have residents been impacted?

Authorities evacuated nearly 1,000 homes at one point and ordered people in nearby schools to shelter in place. Officials said that starting at 6 p.m. on Wednesday, residents in Deer Park and La Porte who had to evacuate would be allowed to return to their homes. A portion of a highway near the pipeline would remain closed, officials said.

Hundreds of customers lost power. Officials said Wednesday afternoon that only two customers remained without electricity in the Deer Park and La Porte area. Repairs to all of the power distribution lines affected by the fire had been completed.

Deer Park's statement said Energy Transfer was “prioritizing the safety of the community and environment as it implements its emergency response plan.”

“We appreciate the patience and understanding of all residents during this ongoing situation,” Deer Park officials said.

By late Tuesday, about 400 evacuees remained, and some expressed frustration over being forced to quickly flee and not being given any timeline for when they will be able to return.

“We literally walked out with the clothes on our backs, the pets, and just left the neighborhood with no idea where we were going,” said Kristina Reff, who lives near the fire. “That was frustrating.”

What about pollution from the fire?

Energy Transfer and Harris County officials have said that air quality monitoring shows no immediate risk to individuals, despite the huge tower of billowing flame that shot hundreds of feet into the air, creating thick black smoke that hovered over the area.

Houston is the nation’s petrochemical heartland and is home to a cluster of refineries and plants and thousands of miles of pipelines. Explosions and fires are a familiar sight, and some have been deadly, raising recurring questions about industry efforts to protect the public and the environment.

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A View From HETI

Lilium aims for the first piloted flight of the Lilium Jet to occur early in 2025. Photo via lilium.com

An aircraft that's being touted as the first fully electric jet is taking off from Hobby Airport to serve the greater Houston area.

Lilium Jet, which takes off and lands vertically, is making its United States market debut at Houston-area facilities – Houston Hobby Airport, Conroe North Houston Regional Airport, and The Woodlands Heliport Lilium. Houston-based aircraft brokerage EMCJET will house the Lilium Jet at its Galaxy FBO Houston-area facilities at the airports.

“We are excited to transform Galaxy FBO into a cutting-edge hub for the eVTOL innovation,” Jeremy Gee, CEO of Galaxy FBO, says in a news release. "As the future of electric aviation takes flight, this marks a significant step in making Houston a leader in sustainable and efficient transportation solutions. Our team is proud to support Lilium's revolutionary mode of travel that will connect Greater Houston in ways never thought possible."

The Lilium Jet is capable of quickly connecting routes like Houston Hobby Airport to Galveston, Houston Spaceport to College Station, The Woodlands to Galveston, and others. The jet is designed for regional travel with its aerodynamic shape. The ducted electric fans prioritize efficiency and speed during forward flight. The jet’s anticipated initial operating range is roughly 110 miles. Lilium aims for the first piloted flight of the Lilium Jet to occur early in 2025.

“Lilium is serious about expanding in the U.S. and actively progressing towards FAA validation,” Lilium’s Vice President of Commercial Americas Matthew Broffman says in a news release.” As part of our commitment to working with communities across the U.S. and expanding our customer base, we’re excited to showcase our aircraft for the first time in Houston, a city with a proud legacy of aerospace innovation in America.”

The Greater Houston Partnership will also host a discussion with industry leaders on how electric aviation can “revolutionize regional travel” according to a news release.

“Houston is home to the world’s leading aerospace companies, and we’re thrilled to welcome Lilium and this next generation of aviation technology,” says Kevin Tipton, senior director for aerospace and aviation at GHP in a news release. “Together, we’re on the brink of something groundbreaking for our region.”

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