Outages expose nation’s frailty
Texas crisis shows U.S. vulnerability to climate change
Even as Texas struggled to restore electricity and water, signs of the risks posed by increasingly extreme weather to America’s aging infrastructure were cropping up across the country.
Last week’s continentspanning winter storms triggered blackouts in Texas, Oklahoma, Mississippi and several other states. One-third of oil production in the nation was halted. Drinking-water systems in Ohio were knocked offline. Road networks nationwide were paralyzed and vaccination efforts in 20 states were disrupted.
The crisis carries a profound warning. As climate change brings more frequent and intense storms, floods, heat waves, wildfires and other extreme events, it is placing growing stress on the foundations of the country’s economy: Its network of roads and railways, drinking-water systems, power plants, electrical grids, industrial waste sites and even homes. Failures in just one sector can set off a domino effect of breakdowns in hard-topredict ways.
Much of this infrastructure was built decades ago, under the expectation that the environment around it
would remain stable or at least fluctuate within predictable bounds. Now climate change is upending that assumption.
“We are colliding with a future of extremes,” said Alice Hill, who oversaw planning for climate risks on the National Security Council during the Obama administration. “We base all our choices about risk management on what’s occurred in the past and that is no longer a safe guide.”
While it is not always possible to say precisely how global warming influenced any one particular storm, scientists said, an overall rise in extreme weather creates sweeping new risks.
Sewer systems are overflowing more often as powerful rainstorms exceed their design capacity. Coastal homes and highways are collapsing as intensified runoff erodes cliffs. Coal ash, the toxic residue produced by coal-burning plants, is spilling into rivers as floods overwhelm barriers meant to hold it back. Homes once beyond the reach of wildfires are burning in blazes they were never designed to withstand.
Problems like these often reflect an inclination of governments to spend as little money as possible, said Shalini Vajjhala, a former Obama administration
official who now advises cities on meeting climate threats. She said it is hard to persuade taxpayers to spend extra money to guard against disasters that seem unlikely.
But climate change flips that logic, making inaction far costlier.
“The argument I would make is, we can’t afford not to, because we’re absorbing the costs” later, Vajjhala said, after disasters strike. “We’re spending poorly.”
The Biden administration has talked extensively about climate change, particularly the need to reduce greenhouse gas emissions and create jobs in renewable energy. But it has spent less time discussing how to manage the growing effects of climate change, facing criticism from experts for not appointing more people who focus on climate resilience.
“I am extremely concerned by the lack of emergency management expertise reflected in Biden’s climate team,” said Samantha Montano, an assistant professor at the Massachusetts Maritime Academy who focuses on disaster policy. “There’s an urgency here that still is not being reflected.” White House spokesperson Vedant Patel said in a statement,.
“Building resilient and sustainable infrastructure that can withstand extreme weather and a changing climate will play an integral role in creating millions of
good paying, union jobs” while cutting greenhouse gas emissions.
While President Joe Biden has called for a major push to refurbish and upgrade the nation’s infrastructure, getting a closely divided Congress to spend hundreds of billions, if not trillions, of dollars will be a major challenge.
Heightening the cost to society, disruptions can disproportionately affect lower-income households and other vulnerable groups, including older people or those with limited English.
“All these issues are converging,” said Robert Bullard, a professor at Texas Southern University who studies wealth and racial disparities related to the environment. “And there’s simply no place in this country that’s not going to have to deal with climate change.”
Many forms of crisis
In September, when a sudden storm dumped a record of more than 2 inches of water on Washington in less than 75 minutes, the result was not just widespread flooding but also raw sewage rushing into hundreds of homes.
Washington, like many other cities in the Northeast and Midwest, relies on what is called a combined sewer overflow system; if a downpour overwhelms storm drains along the street, they are built to overflow into the pipes that carry raw sewage.
But if there is too much pressure, sewage can be pushed backward, into people’s homes, where the forces can send it erupting from toilets and shower drains.
This is what happened in Washington. The city’s system was built in the late 1800s. Now climate change is straining an already outdated design.
DC Water, the local utility, is spending billions of dollars so that the system can hold more sewage.
“We’re sort of in uncharted territory,” said Vincent Morris, a utility spokesperson.
The challenge of managing and taming the nation’s water supplies — whether in streets and homes or in vast rivers and watersheds — is growing increasingly complex as storms intensify. Last May, rain-swollen flooding breached two dams in central Michigan, forcing thousands of residents to flee their homes and threatening a chemical complex and toxic waste cleanup site. Experts warned it was unlikely to be the last such failure.
Many of the country’s 90,000 dams were built decades ago and already were in dire need of repairs. Now climate change poses an additional threat, bringing heavier downpours to parts of the country and raising the odds that some dams could be overwhelmed by more water than they were designed to handle. One recent study found that most
of California’s biggest dams were at increased risk of failure as global warming advances.
Grid vulnerabilities
If the Texas blackouts exposed one state’s poor planning, they also provided a warning for the nation: Climate change threatens virtually every aspect of electricity grids that are not always designed to handle increasingly severe weather. The vulnerabilities show up in power lines, natural gas plants, nuclear reactors and myriad other systems.
Higher storm surges can knock out coastal power infrastructure. Deeper droughts can reduce water supplies for hydroelectric dams. Severe heat waves can reduce the efficiency of fossil-fuel generators, transmission lines and even solar panels at precisely the moment that demand soars because everyone cranks up their air conditioners.
Climate hazards also can combine in new and unforeseen ways.
In California, Pacific Gas & Electric has had to shut off electricity to thousands of people during exceptionally dangerous fire seasons. The reason: Downed power lines can spark huge wildfires in dry vegetation. Then, during a record-hot August last year, several of the state’s natural gas plants malfunctioned in the heat, just as demand was spiking, contributing to blackouts.
Nation’s arteries at risk
The collapse of a portion of California’s Highway 1 into the Pacific Ocean after heavy rains last month was a reminder of the fragility of the nation’s roads.
Several climate-related risks appeared to have converged to heighten the danger. Rising seas and higher storm surges have intensified coastal erosion, while more extreme bouts of precipitation have increased the landslide risk.
Add to that the effects of devastating wildfires, which can damage the vegetation holding hillside soil in place, and “things that wouldn’t have slid without the wildfires start sliding,” said Jennifer Jacobs, a professor of civil and environmental engineering at the University of New Hampshire. “I think we’re going to see more of that.”
The U.S. depends on highways, railroads and bridges as economic arteries for commerce, travel and simply getting to work. But many of the country’s most important links face mounting climate threats. More than 60,000 miles of roads and bridges in coastal floodplains are already vulnerable to extreme storms, government estimates show.
“A lot of our infrastructure systems have a tipping point. And when you hit the tipping point, that’s when a failure occurs,” Jacobs said. “And the tipping point could be an inch.”