HOUSTON – Nine years after Hurricane Harvey turned streets into rivers and flooded neighborhoods across the Houston area, Harris County has more flood-control infrastructure in place. But is the region ready for another storm of that magnitude?
The answer depends on where you live — and what “safer” means.
Some neighborhoods are better protected because of new detention basins, wider channels, drainage repairs and voluntary buyouts of flood-prone homes. But no realistic amount of construction could prevent all flooding if the region received another 40 to 50 inches of rain, according to James Doss-Gollin, an assistant professor of civil and environmental engineering at Rice University.
“I would say honestly about the same,” Doss-Gollin said when asked whether Houston is safer overall.
He said new infrastructure has reduced flood peaks in some places, but regional growth has added homes and pavement in areas that once absorbed water.
“Water is going to move faster on an urbanized surface than on a prairie,” Doss-Gollin said. “And second, it just means there’s more people, more space. So if it floods someplace that used to be prairie, in the past, we might not have cared about that. But now there’s a subdivision there, so we care about that.”
Growth also brings economic activity and tax revenue that can support flood projects and emergency services, Doss-Gollin said. The challenge is where and how that growth occurs.
What has changed since Harvey
Harvey made landfall near Rockport as a Category 4 hurricane on Aug. 25, 2017, then stalled and produced days of catastrophic rainfall across Southeast Texas. The National Weather Service says rainfall totals across the Houston area ranged from 4.62 inches to 56 inches.
One year later, Harris County voters approved a $2.5 billion bond to pay for flood-risk reduction projects. That money, combined with local, state and federal partnership funding, supports work across the county’s watersheds.
In a September 2025 update, the Harris County Flood Control District said $1.5 billion had been invested through the bond program.
The district said that work had created 16,000 acre-feet of stormwater detention, improved 46,000 linear feet of channels, preserved 5,800 acres and moved more than 3,100 families out of vulnerable areas through voluntary buyouts.
The district also reported 54 completed bond initiatives and 75 active initiatives funding more than 240 individual projects.
A bond initiative can contain one project, one phase of a project or several related projects. That means the number of completed initiatives is not the same as the number of individual construction projects.
A newer Harris County budget document says that by June 2026, 58 bond initiatives had been completed and 72 remained active. Another 25 were paused, 15 were closing and 11 had been transferred. The newer document does not provide an updated count of the individual projects within those initiatives.
The work includes stormwater detention basins, which temporarily hold excess rainwater and release it slowly after the threat of flooding passes. Other projects widen or repair bayous and drainage channels, preserve floodplain land or purchase homes in places where structural projects are not considered cost-effective.
The Flood Control District said its completed projects helped protect thousands of homes during Hurricane Beryl in 2024. It also acknowledged that inflation, rising construction costs and pandemic-related challenges changed what could be delivered with the money voters approved.
Doss-Gollin said those rising costs matter because the bond does not buy as much construction as it did when voters approved it.
“You know, I know that one of the challenges that they’ve been wrestling with is that the cost of construction and everything else, just like they’re experiencing inflation the same way that we are, and so the money that was approved by the time you get to 2026, it buys you less, just like groceries and everything also buy you less,” Doss-Gollin said. “But as far as I can see, you know, there’s a lot of projects that are happening.”
New basin, lingering concern in Inwood
The Inwood Forest Stormwater Detention Basin is one example of the county’s post-Harvey work.
The project in the White Oak Bayou watershed was designed to hold stormwater during heavy rain and release it gradually, reducing the amount of water moving downstream at one time.
Michael Willis, a lifelong Houston resident who lives near the basin, said his home did not flood during Harvey. Water reached the sidewalk, he said. Still, the new project has not erased his concerns.
“Well, I can’t say I feel safer. I appreciate the efforts,” Willis said. “But once that pond, retention pond or whatever it is back there fills up, there’s nowhere else for it to go.”
Willis said he hopes the basin works as intended but believes only another major storm will show how much protection it provides.
“That doesn’t make me feel comfortable because it might provide a safe zone for the area that it’s in, but if you’re talking about all of Houston, that doesn’t provide for that,” Willis said. “Hopefully it works.”
The basin is not intended to protect the entire Houston region. Detention projects are designed to reduce risk in particular drainage areas, and their benefits can vary depending on where rain falls and how intense it becomes.
Why Houston cannot be flood-proof
Doss-Gollin said Harris County has built meaningful infrastructure, including detention basins, repairs and channel improvements. Those projects can reduce flooding in specific areas, particularly downstream from large detention sites.
But Houston’s flat terrain and Harvey’s extraordinary rainfall create a physical limit on what infrastructure can accomplish, he said.
“To be honest, I don’t think there’s any amount of infrastructure building that’s gonna be enough to make Houston Harvey proof,” Doss-Gollin said. “So that’s why I think a lot of the focus needs to be on not just keeping the water from ever getting to us because if you get 40 inches of rain, there’s nowhere for it to go.”
He said planning must also focus on keeping essential services operating and making sure first responders can reach neighborhoods when flooding cannot be prevented.
Doss-Gollin gave the region a grade in the “B minus C plus range,” pointing to infrastructure progress while citing sprawl and the need to build emergency response into infrastructure planning.
“We’ve made a lot of progress. We’ve built a lot infrastructure,” Doss-Gollin said. “At the same time, again, the sprawl has been a challenge. And I think there’s still a lot to do in terms of operationalizing emergency preparedness and integrating that into our infrastructure planning.”
Why flood maps do not tell the whole story
The county is developing updated flood-risk maps. Harris County’s MAAPnext program cautions that a home can be outside a mapped high-risk flood zone and still flood.
Flood maps show estimated probabilities. They do not promise that a property outside a mapped floodplain is safe.
Doss-Gollin said that distinction is easy for residents to misunderstand.
“But now a lot of people think that if you live outside the flood plain, you’re not gonna flood,” Doss-Gollin said. “Which is, you drive any day that it rains and you see that there’s streets flooding that are maybe outside the Flood Plain.”
He said flood risk also changes from one storm to another, meaning different neighborhoods can be affected during different floods.
What residents can do now
Doss-Gollin recommends that residents consider flood insurance regardless of whether their property is in a designated high-risk area. FEMA says about 40% of National Flood Insurance Program claims come from outside high-risk flood zones.
“Obviously, the money can’t make up for all the things that you lose, but at least it means you can afford to get back on your feet,” Doss-Gollin said.
Residents should also know what they would do if their street or home flooded, keep nonperishable food and water available and prepare for possible interruptions to electricity, drinking water or medical services.
“Even if you live in the least flood-prone neighborhood, you can get 20 inches of rain in 12 hours anywhere in the city,” Doss-Gollin said. “And so you should be prepared for that. You should think about what’s going to happen if your neighborhood floods.”
Nine years after Harvey, Harris County has more tools to reduce flood damage than it did in 2017. Those projects can make a meaningful difference when the next storm comes.
But the conclusion from both the engineering and the lived experience is more complicated than a simple yes or no: Houston can reduce its risk, but it cannot eliminate it.
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