That’s Galveston Island going for a dip in the before-and-after captures above, from a set of interactive timelapse maps released by the Texas Tribune and ProPublica yesterday (along with several articles by authors Kiah Collier and Neena Satija). The new maps model flooding across the Houston region during Hurricane Ike — as well as what would have happened if Ike had actually hit just south of Houston, as meteorologists initially expected.
The maps are your chance to relive an old disaster, or to see how many of your neighbors you can take out with a hypothetical-but-not-unrealistic future storm: users can pick between Ike, south-er Ike, a storm 15% stronger than Ike (nicknamed Mighty Ike), and a modeled 500-year storm (which the article suggests may actually be a concern on the every-few-decades-or-so level; ‘500-year’ has always meant ‘a low probability in any year’, and climate change is shaking up old modeling assumptions). The graphics also include a few dramatic face-offs: Mighty Ike and the 500-year storm VS. 2 of the miles-long multi-billion-dollar coastal protection projects being studied for the upper Texas coast.
You can even search for your home address in the map system to see what flood levels might look like in your own back yard. Here’s what the maps show happening to the Clear Lake, Seabrook, and League City areas at the peak of the 500-year storm model’s storm surge, which the article says is a “not if, but when” event:
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Hell and High Water
SHAKING AT THE TOP OF A HOUSTON SKYSCRAPER IN THE MIDDLE OF A HURRICANE Houstonians who were around for Hurricane Alicia in 1983 might remember that the Wells Fargo Plaza tower downtown — then known as the brand-new Allied Bank Plaza — ended up losing more than 3,000 glass panels in the storm. But did you know that the building that night became the site of one of the few live wiggling-skyscrapers-in-a-storm experiments ever conducted? Engineers Robert Halvorson and Michael Fletcher spent the night of the hurricane in the 71-story tower’s unfinished top floor, just to see how much the building would sway; more than 30 years later, they described their experiences to Washington Post reporter Emily Badger. The peak acceleration of 43 milli-g’s they recorded — enough back-and-forth and twisting to make it impossible for them to walk upright — turned out to be “give or take, exactly the same thing that had been predicted by the wind tunnel” before the structure was built. [Gizmodo] Photo of Wells Fargo Plaza: Jackson Myers
BUILDING A MONUMENT TO GATED FLOOD CONTROL AND TOURISM Protecting the Ship Channel during an Ike-like (or worse) storm surge has led some to propose a big dike, others a big gate. But UH professor of urban planning Tom Colbert doesn’t see why we couldn’t trouble ourselves to make such protection a real sight to see too: “Colbert likes the idea of . . . connecting the Centennial Gate and its levees to the proposed Lone Star National Recreation Area, undeveloped land that would both attract ecotourists and slow floodwaters,” reports the Houston Chronicle’s Lisa Gray: “I remembered one drawing I’d seen in [Colbert’s] PowerPoint show: Happy tourists, paddling kayaks past the Hartman Bridge, on one of the byways out of the big ships’ path, waterbirds and wetlands all around. Colbert motioned southeast, toward the Ship Channel’s mouth, toward Barbours Cut, the other possible location for the floodgate. There, he said, the levees would cross the channel’s water, connecting the Ship Channel’s artificial islands — made from dirt dredged from the channel — to the shore. Enough room could be left on top of the levee for a hiking path or even for car access; for the first time, it would be possible for people to get to the Atkinson Island Wildlife Management Area — a bird mecca on manmade land — without a boat. You could even, he notes, build a tourist destination atop one of those islands: He proposes a monument to Houston, the gateway to North America, the place where nature meets industry. In some drawings, just to give people the idea, he plunks the Statue of Liberty atop a Ship Channel island.” [Houston Chronicle ($); previously on Swamplot] Photo of Fred Hartman Bridge: Chuck Wilkson
What could possibly have been worse than Hurricane Ike? Super Ike, a stronger hurricane aimed 30 miles further west, causing a larger storm surge, more deaths, and significantly greater damage to Houston’s industrial infrastructure. To protect against that hypothetical $100 billion threat, a Rice University team is recommending some bolstered defenses for the region. Included among the suggestions: a “moveable gate structure” just upstream from Baytown’s Fred Hartman Bridge, to block the Ship Channel and San Jacinto River from rising waters in Galveston Bay (pictured above); elevating Hwy. 146 along the west edge of Galveston Bay so that it forms a levee protecting much of La Marque, Dickinson, League City, Clear Lake, and La Porte; a “baywall” to protect Galveston Island’s backside from sneaky storm surge waters; and preserving a 130-mile-long stretch of existing coastal wetlands between High Island and Matagorda as a recreation area and when-needed storm barrier.
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Houston ranks 5th — below Long Island, Miami, Virginia Beach, New Orleans, and Tampa — in potential property damage from storm surges, according to an annual report from Corelogic. The company figures the resulting storm surge from a Category 5 Hurricane here would likely produce $20 billion in property loss — well behind Long Island’s $99 billion score. Can’t this city do a little better? We’ve got the high-hurricane-risk and low-lying-properties parts down cold. If we can just boost the property values a bit in those areas, we’ll be rolling with the high-stakes big boys next time.
The top at-risk area Zip Codes, according to the company’s report: 77573, 77554, 77059, 77571, 77062, 77566, 77586, 77539, 77546, and 77521. Locally, League City leads the way!
LIVING IN THE SOG ZONE As Hurricane Alex heads for the northern banks of Mexico more than 300 miles away and the National Weather Service issues a coastal flood warning, the Chronicle‘s Clear Lake website offers this bit of advice: “Residents throughout Clear Lake and the rest of the Houston area should watch for street flooding in the usual areas.” [Ultimate Clear Lake]
HURRICANE IKE’S LOUSY AIM Director Phil Bedient comments on a report released today by Rice University’s Severe Storm Prediction, Education and Evacuation from Disasters Center (SSPEED): “‘Ike was a Category 2 hurricane, and it caused $30 billion in damage. Had that same storm struck 30 miles farther south, it could easily have caused $100 billion in damage. Had it struck that location as a Category 4 storm, like Carla, the results would have been catastrophic.’ . . .
Bedient said one need look no further than the Houston Ship Channel to get a clear sense of the region’s vulnerability. The ship channel is home to one of the nation’s busiest ports and about one-quarter of U.S. refineries. The Coast Guard estimates a one-month closure of a major port like Houston would cost the national economy $60 billion.
Despite this, government regulations require dikes and levees that can protect ship channel facilities against only the 100-year flood of 14-15 feet. Bedient said that based upon results from supercomputer models at the University of Texas, Austin, Ike could have caused a 20- to 25-foot storm surge along the ship channel if it had struck about 30 miles farther south.” [SSPEED, via Memorial Examiner; report (PDF)]
Too bad we can’t embed the video here. So here’s a transcript of the rationale — presented by the writers of the Discovery Channel’s Mega Engineering series — for building that massive, mile-diameter geodesic dome over Houston (or at least the Downtown part):
Houston, Texas — the country’s fourth most populous city — is in peril.
Houston has always been vulnerable to killer hurricanes: From the great storm of 1900, the deadliest in U.S. history, which killed 8,000 people, to Hurricane Ike in 2008, which caused more than $10 billion in damage, and forced the city center to shut down for nearly a week.
And it’s not only hurricanes. Searing heat and humidity also oppress this great city. On nearly 100 days each year, the temperature climbs above 90 degrees, which in muggy Houston feels even hotter.
Air conditioning provides relief, but at a cost. Houstonians’ soaring electricity use has nudged the city ahead of Los Angeles in the race to become the country’s number-one producer of greenhouse gases — a dubious distinction. And the problem is only getting worse.
Forced to spend a fortune in a losing battle against nature, and with energy costs spiking unpredictably, Houston finds itself square in the path of an environmental juggernaut, which threatens to make the city unlivable.
That’s why some think that the only way to save Houston is to move it indoors.
Diagram of Houston Dome: Engineering, Discovery Channel