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Texas Study Shows Business Impact of Major Storms

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A new study conducted by Texas A&M University at Galveston and the Texas General Land Office examines the 50-year impact of a major storm hitting Galveston Bay on the Texas coast near Houston, including secondary effects to the economy. The study focused on catastrophic “500-year” flood events (with a one-in-500 chance of occurring in a year), which, while rare, have hit the state 3 times in recent years. This includes Hurricane Harvey, which struck Louisiana and Texas in August 2017, causing $125 billion in damage, according to the National Hurricane Center.

These larger storms have serious economic impacts locally, regionally and nationally. Over a 50-year time frame, the study notes, “the projected economic impact on Texas’ Gross State Product (GSP) of storm surge without coastal protection is substantial.” In the wake of a 500-year magnitude event, the regional petroleum and chemical manufacturing sectors would see their output decline by 19% (or $175.4 billion) in lost revenue, as well as a projected 17% loss of petroleum jobs (approximately 155,000 jobs) and a petroleum price increase of 13%. It would also impact the region’s housing, with the sector declining by 8%, or $39.5 billion lost in sales.

A 500-year surge event striking Galveston Bay would also have serious impacts for national economic activity, especially because the region processes 25% of the petroleum and more than half of the jet fuel used in the United States. According to the study, U.S. GDP could drop 1.1% (approximately $883 billion), U.S. exports would suffer a 4% drop (approximately $1.66 billion) and “30 states not including Texas will have lower GSP in response to a surge event in Texas.”

“The Galveston Bay region is one of the most flood- and surge-prone areas in the United States with vast amounts of vulnerable residential, commercial, industrial and petro-chemical areas at risk,” said Texas Land Commissioner George P. Bush. “This study clearly demonstrates that, without any new protections in place, future storm surges could have substantial and lingering impacts on Texas’ economy and send lasting ripples through other economic sectors nationwide.”

Turning to mitigation, the authors of the report assessed the potential measure of a 17-foot “coastal spine,” also called a “coastal storm suppression system,” made up of “connecting seawalls and fortified dunes/levees along the coastline to retractable gates.” In October, the Army Corps of Engineers released the study Coastal Texas Protection and Restoration Feasibility Study proposing a similar example of this sort of structure—74 miles of barrier, including “floodwalls (inverted T-walls), floodgates (both highway and railroad floodgates), seawall improvements, drainage structures, pump stations, and surge barrier gates.”

The researchers estimate that a coastal spine would reduce the region’s lost petroleum and chemical manufacturing sector losses to 3% and 5%, respectively, a 1% reduction in regional unemployment, and a 1% increase in petroleum product prices. The report also claims that a coastal spine mitigation plan would reduce Houston-Galveston regional insurance premiums by as much as 28%. This could provide significant relief for insurers as well. Even though insurance and reinsurance only covered about 30% of the total wind and flood damage from Hurricane Harvey, this amounted to tens of millions in losses.

In terms of construction cost, the Texas researchers polled residents of three local counties and found that 56% “believed that both government and port industries should be responsible for financing the coastal barrier system,” and a majority agreed that some form of taxation should support its construction.

6.5 Million U.S. Homes Worth Nearly $1.5 Trillion at Risk of Hurricane Storm Surge Damage

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Storm Surge Flooding MISHELLA / Shutterstock.com

More than 6.5 million homes along the U.S. Atlantic and Gulf coasts are at risk of storm surge inundation, representing nearly $1.5 trillion in total potential reconstruction costs, according to Corelogic’s 2014 Storm Surge Report. Of that risk, more than $986 billion is concentrated within 15 major metropolitan areas.

While many homes and businesses most vulnerable to hurricane damage are in Federal Emergency Management Agency flood zones, these represent just a fraction of the structures that suffer a hurricane’s effects.

Homeowners who live outside the FEMA flood zones typically do not carry flood insurance, given that there is no mandate to do so, and therefore may not be aware of the potential risk storm surge poses to their properties, Corelogic explains.

Uncertainty about the geographical and meteorological risks may lull many into a false sense of safety.
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“This year’s season is projected to be slightly below normal in hurricane activity, but the early arrival of Hurricane Arthur on July 3 is an important reminder that even a low-category hurricane or strong tropical storm can create powerful riptides, modest flooding and cause significant destruction of property,” said Dr. Thomas Jeffery, senior hazard scientist for CoreLogic Spatial Solutions.

Florida ranks number one for the highest number of homes at risk of storm surge damage, with nearly 2.5 million homes at various risk levels and $490 billion in total potential exposure to damage. Here’s how all 19 states studied stack up, based on number of homes at risk:

State Table (Ranked by Number of Homes at Risk)

At the local level, the New York metropolitan area (including northern New Jersey and Long Island) contains not only the highest number of homes at risk for potential storm surge damage (687,412), but also the highest total reconstruction value of homes exposed, at more than $251 billion. Take a look at the storm surge risk for the top 15 metro areas:

Storm Surge Risk for Top 15 Metro Areas

Corelogic also noted variation in the costs of rebuilding, which does not directly correlate to the amount of property at risk. The total reconstruction cost value of homes along the Atlantic coast is nearly 1 billion, for example, which is approximately double the value of at-risk properties in the Gulf region’s 5 billion.

Supertyphoon Haiyan Devastates Philippines

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Supertyphoon Haiyan strikes the Philippines

Supertyphoon Haiyan hit the Philippines on Friday, leaving at least 10,000 residents dead and hundreds of thousands without reliable food, shelter or water. One of the strongest storms ever recorded, Haiyan’s winds surpassed 140 miles per hour, bringing record storm surges. The full extent of the damage remains uncertain, with communication and transportation severely restricted.

The World Bank has called the Philippines one of the most hazard-prone countries in the world. Closed roads and airports restricted aid efforts after Supertyphoon Haiyan, and communication failures posed some of the greatest challenges to both assessing and recovering from damage.

“Under normal circumstances, even in a typhoon, you’d have some local infrastructure up and some businesses with which you can contract,” Praveen Agrawal, the World Food Program’s Philippines representative and country director, told the New York Times. “Being as strong as it was, it was very much like a tsunami. It wiped out everything. It’s like starting from scratch” in terms of delivering the aid, he said.

The United Nations has set aside over $300 million to help with the country’s recovery from Haiyan over the next six months, and three dozen individual nations and international organizations have pledged financial and humanitarian assistance. The United States recalled thousands of sailors from shore leave back to the USS George Washington, a massive aircraft carrier currently docked in Hong Kong, to use its 80 aircraft to help deliver supplies and evacuate victims in the Philippines’ hardest-hit islands.

Yet with the broad scope of damage to critical infrastructure, the process has been slow. In the major city of Tacloban, for example, the traffic control tower at one of the country’s biggest airports was destroyed, forcing all aircraft to land by sight, further slowing distribution of food and water. Officials opened smaller airstrips, focusing on safely reopening transportation routes as the hundreds of thousands of evacuees continue to face extreme water shortage. This shortage further compounds the dangers authorities face in recovery, as health officials grow more concerned about water-borne diseases. Most notably, the lack of clean drinking and bathing water in crowded evacuation centers brings risk of diarrhea, leptospirosis and dengue.

Officials are looking forward while managing the catastrophic fallout. According to the Wall Street Journal:

Finance Secretary Cesar Purisima acknowledged that the destruction wrought by the disaster on an area that contributes 12.5% to gross domestic product could shave off as much as a full percentage point to economic growth next year, when the government targets GDP expansion of at least 6.5%. He is hopeful that the adverse effect on growth will be cushioned, if not offset, by the reconstruction spending.

“From a fiscal standpoint, we do have fiscal space to spend for reconstruction. The estimates are preliminary, but we need to invest significantly on infrastructure,” Mr. Purisima said.

The New York Times reported:

HSBC Global Research said that the typhoon probably destroyed half the sugar cane production areas in Leyte Province, and that all told, 3.5 percent of the nation’s sugar cane output was probably lost. It also warned of inflationary shocks to the Philippine economy in the coming months, as supply chains are disrupted.

But given the general health of the Philippine economy and the fact that the typhoon affected geographic areas and sectors like agriculture that are not major drivers of the nation’s output, HSBC said, “The economic impact will be limited.”

Citi Research estimated that infrastructure damage will probably run into billions of pesos, exceeding $70 million.

In Warsaw on Monday, some delegates at United Nations talks on a global climate treaty suggested that global warming was responsible for making Haiyan such a devastating storm. Naderev Saño, the chief representative of the Philippines at the conference, told the New York Times, “What my country is going through as a result of this extreme climate event is madness; the climate crisis is madness.”

Scientists cannot be certain of the overall impact of climate change on severe weather like hurricanes and typhoons, but have noted that more powerful storms will continue as the climate changes. With winds of at least 140 miles an hour, Typhoon Haiyan is considered one of the strongest storms to make landfall. “As you warm the climate, you basically raise the speed limit on hurricanes,” said M.I.T. atmospheric scientist Kerry A. Emanuel.

The powerful storm surges recorded are also likely part of a new reality in major storms. “When you strip everything else away, we’re seeing a general rise in sea level,” James P. Kossin, atmospheric scientist at the National Climatic Data Center, told the Times. “There’s no question that storm surge is going to be compounded.”