Tag Archives: climate change severe weather

Immediate Vault Immediate Access

Catastrophic Floods More Frequent in 2019

Posted on by

Last week, after already experiencing heavy rainfalls and flooding, New Orleans was preparing for tropical storm Barry, expecting the storm to overflow or even breach the city’s levees. Flights in and out of the city were cancelled, as were concerts and other public events, as the city braced for catastrophe. Barry ended up narrowly missing New Orleans, and instead moved inland, drenching other parts of Louisiana and Mississippi and causing floods and mass power outages in those areas. It was yet another example of how major flooding has become a normal occurrence for many regions of the country, and by all indications, it is becoming worse each year.

The National Oceanic and Atmospheric Administration (NOAA) stated in its report 2017 State of U.S. High Tide Flooding and 2018 Outlook that “The projected increase in high tide flooding in 2018 may be as much as 60 percent higher across U.S. coastlines as compared to typical flooding about 20 years ago and 100% higher than 30 years ago.” This prediction turned out to be accurate, as the United States saw massive flooding throughout 2018, including “sunny-day” or “high-tide” flooding that occurs during high tides outside of hurricane events.

In its recent report on 2018 high-tide flooding and 2019 outlook, the NOAA said that these floods’ median frequency in 2018 “reached 5 days, which tied the historical record of 2015.” Of the 98 observed locations along the U.S. coastline, 12 reportedly broke or tied their all-time records for high-tide flooding in 2018. And now, the NOAA is predicting that 2019 could be even worse.

The NOAA noted that high-tide flooding “is increasingly common due to years of relative sea level increases. It no longer takes a strong storm or a hurricane to cause flooding in many coastal areas.” The Union of Concerned Scientists has said that sea level rise is accelerating, that “sea levels in the U.S. are rising fastest along the East Coast and Gulf of Mexico,” and that the primary reason for this sea level rise is climate change melting land ice and heating oceans.

According to the NOAA’s 2019 projections, it expects high-tide flooding along the U.S. coastlines this year to reach double the numbers from 2000. Additionally, “the Northeast Atlantic could see a 140% increase, the Southeast could see a 190% increase, and the Western Gulf of Mexico could see a 130% increase.”

Almost 40% of the U.S. population lives in coastal areas, and could be at risk from flooding effects. With the start of hurricane season, these dangers will only increase as storms batter the coasts. Even before Barry threatened, New Orleans faced massive flooding last week, while Pittsburgh contended with flash floods. And the week before, heavy rains left Washington, D.C. and surrounding towns swimming in water that overwhelmed the city’s storm water pipes.

These increasing floods mean serious losses for people, municipalities and businesses. The recent DC-area floods reportedly caused $3.5 million in damage to Arlington, Virginia county infrastructure alone. In March, a “bomb cyclone” hit Nebraska, with heavy rainfall causing damages totaling more than $1.3 billion. This figure includes $449 million in road, levee and other infrastructure damage, as well as serious damage to more than 2,000 homes and 340 businesses. Iowa also experienced flooding that caused water treatment plants to shut down, depriving two cities’ residents of fresh water. And across the Midwest, agriculture was also hit hard by flooding, slowing corn and soybean planting. The delay may decrease harvests by at least 8% and increase prices worldwide.

As Risk Management Monitor has previously reported, Texas A&M University at Galveston and the Texas General Land Office examined the 50-year impact of a major storm hitting Galveston Bay on the Texas coast near Houston, finding that major storm events that caused flooding would have huge secondary effects on the economy, both locally and nationally.

Various states, including those along the Mississippi River, have already enacted flood control measures like levees, dams and flood walls, but have seen this year’s increased flooding defeat these measures. Others have encouraged residents to purchase flood insurance to offset losses. But the increasing scope of future floods may mean that these steps are not enough. Though tropical storm Barry missed New Orleans, experts have still expressed concern about coming storms possibly “topping” the city’s levees, which could cause even more damage to the already-flooded city.

Supertyphoon Haiyan Devastates Philippines

Posted on by

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.”