Arquivo da tag: Nevasca

Texas’s Power Crisis Has Turned Into a Disaster That Parallels Hurricane Katrina (TruthOut)

truthout.org

Sharon Zhang, Feb. 18, 2021


Propane tanks are placed in a line as people wait for the power to turn on to fill their tanks in Houston, Texas on February 17, 2021.
Propane tanks are placed in a line as people wait for the power to turn on to fill their tanks in Houston, Texas, on February 17, 2021. Mark Felix for The Washington Post via Getty Images

As many in Texas wake up still without power on Thursday morning, millions are now also having to contend with water shutdowns, boil advisories, and empty grocery shelves as cities struggle with keeping infrastructure powered and supply chains are interrupted.

As of estimates performed on Wednesday, 7 million Texans were under a boil advisory. Since then, Austin has also issued a citywide water-boil notice due to power loss at their biggest water treatment plant. Austin Water serves over a million customers, according to its website.

With hundreds of thousands of people still without power in the state, some contending that they have no water coming out of their faucets at all, and others facing burst pipes leading to collapsed ceilings and other damage to their homes, the situation is dire for many Texans facing multiple problems at once.

Even as some residents are getting their power restored, the problems are only continuing to layer as the only grocery stores left open were quickly selling out of food and supplies. As many without power watched their refrigerated food spoil, lines to get into stores wrapped around blocks and buildings and store shelves sat completely empty with no indication of when new shipments would be coming in. Food banks have had to cancel deliveries and schools to halt meal distribution to students, the Texas Tribune reports.

People experiencing homelessness, including a disproportionate number of Black residents, have especially suffered in the record cold temperatures across the state. There have been some reports of people being found dead in the streets because of a lack of shelter.

“Businesses are shut down. Streets are empty, other than a few guys sliding around in 4x4s and fire trucks rushing to rescue people who turn their ovens on to keep warm and poison themselves with carbon monoxide,” wrote Austin resident Jeff Goodell in Rolling Stone. “Yesterday, the line at our neighborhood grocery store was three blocks long. People wandering around with handguns on their hip adds to a sense of lawlessness (Texas is an open-carry state).”

The Texas agricultural commissioner has said that farmers and ranchers are having to throw away millions of dollars worth of goods because of a lack of power. “We’re looking at a food supply chain problem like we’ve never seen before, even with COVID-19,” he told one local news affiliate.

An energy analyst likened the power crisis to the fallout of Hurricane Katrina as it’s becoming increasingly clear that the situation in Texas is a statewide disaster.

As natural gas output declined dramatically in the state, Paul Sankey, who leads energy analyst firm Sankey Research, said on Bloomberg, “This situation to me is very reminiscent of Hurricane Katrina…. We have never seen a loss [of energy supply] at this scale” in mid-winter. This is “the biggest outage in the history [of] U.S. oil and gas,” Sankey said.

Many others online echoed Sankey’s words as “Katrina” trended on Twitter, saying that the situation is similar to the hurricane disaster in that it has been downplayed by politicians but may be uncovered to be even more serious in the coming weeks.

Experts say that the power outages have partially been caused by the deregulation of the state’s electric grid. The government, some say, favored deregulatory actions like not requiring electrical equipment upgrades or proper weatherization, instead relying on free market mechanisms that ultimately contributed to the current disaster.

Former Gov. Rick Perry faced criticism on Wednesday when he said that Texans would rather face the current disaster than have to be regulated by the federal government. And he’s not the only Republican currently catching heat — many have begun calling for the resignation of Gov. Greg Abbott for a failure of leadership. On Wednesday, as millions suffered without power and under boil-water advisories, the governor went on Fox to attack clean energy, which experts say was not a major contributor to the current crisis, and the Green New Deal.

After declaring a state of emergency in the state over the weekend, the Joe Biden administration announced on Wednesday that it would be sending generators and other supplies to the state.

The freeze in Texas exposes America’s infrastructural failings (The Economist)

economist.com

Feb 17th 2021

You ain’t foolin’ nobody with the lights out

WHEN IT RAINS, it pours, and when it snows, the lights turn off. Or so it goes in Texas. After a winter storm pummelled the Lone Star State with record snowfall and the lowest temperatures in more than 30 years, millions were left without electricity and heat. On February 16th 4.5m Texan households were cut off from power, as providers were overloaded with demand and tried to shuffle access to electricity so the whole grid did not go down.

Whole skylines, including Dallas’s, went dark to conserve power. Some Texans braved the snowy roads to check into the few hotels with remaining rooms, only for the hotels’ power to go off as they arrived. Others donned skiwear and remained inside, hoping the lights and heat would come back on. Across the state, what were supposed to be “rolling” blackouts lasted for days. It is still too soon to quantify the devastation. More than 20 people have died in motor accidents, from fires lit for warmth and from carbon-monoxide poisoning from using cars for heat. The storm has also halted deliveries of covid-19 vaccines and may prevent around 1m vaccinations from happening this week. Several retail electricity providers are likely to go bankrupt, after being hit with surging wholesale power prices.

Other states, including Tennessee, were also covered in snow, but Texas got the lion’s share and ground to a halt. Texans are rightly furious that residents of America’s energy capital cannot count on reliable power. Everyone is asking why.

The short answer is that the Electric Reliability Council of Texas (ERCOT), which operates the grid, did not properly forecast the demand for energy as a result of the storm. Some say that this was nearly impossible to predict, but there were warnings of the severity of the coming weather in the preceding week, and ERCOT’s projections were notably short. Brownouts last summer had already demonstrated the grid’s lack of excess capacity, says George O’Leary of Tudor, Pickering, Holt & CO (TPH), an energy investment bank.

Many Republican politicians were quick to blame renewable energy sources, such as wind power, for the blackouts, but that is not fair. Some wind turbines did indeed freeze, but natural gas, which accounts for around half of the state’s electricity generation, was the primary source of the shortfall. Plants broke down, as did the gas supply chain and pipelines. The cold also caused a reactor at one of the state’s two nuclear plants to go offline. Transmission lines may have also iced up, says Wade Schauer of Wood Mackenzie, an energy-research firm. In short, Texas experienced a perfect storm.

Some of the blame falls on the unique design of the electricity market in Texas. Of America’s 48 contiguous states, it is the only one with its own stand-alone electricity grid—the Texas Interconnection. This means that when power generators fail, the state cannot import electricity from outside its borders.

The state’s deregulated power market is also fiercely competitive. ERCOT oversees the grid, while power generators produce electricity for the wholesale market. Some 300 retail electricity providers buy that fuel and then compete for consumers. Because such cold weather is rare, energy companies do not invest in “winterising” their equipment, as this would raise their prices for consumers. Perhaps most important, the state does not have a “capacity market”, which would ensure that there was extra power available for surging demand. This acts as a sort of insurance policy so the lights will not go out, but it also means customers pay higher bills.

For years the benefits of Texas’s deregulated market structure were clear. At 8.6 cents per kilowatt hour, the state’s average retail price for electricity is around one-fifth lower than the national average and about half the cost of California’s. In 1999 the state set targets for renewables, and today it accounts for around 30% of America’s wind energy.

This disaster is prompting people to question whether Texas’s system is as resilient and well-designed as people previously believed. Greg Abbott, the governor, has called for an investigation into ERCOT. This storm “has exposed some serious weaknesses in our free-market approach in Texas”, says Luke Metzger of Environment Texas, a non-profit, who had been without power for 54 hours when The Economist went to press.

Wholly redesigning the power grid in Texas seems unlikely. After the snow melts, the state will need to tackle two more straightforward questions. The first is whether it needs to increase reserve capacity. “If we impose a capacity market here and a bunch of new cap-ex is required to winterise equipment, who bears that cost? Ultimately it’s the customer,” says Bobby Tudor, chairman of TPH. The second is how Texas can ensure the reliability of equipment in extreme weather conditions. After a polar vortex in 2014 hit the east coast, PJM, a regional transmission organisation, started making higher payments based on reliability of service, says Michael Weinstein of Credit Suisse, a bank. In Texas there is no penalty for systems going down, except for public complaints and politicians’ finger-pointing.

Texas is hardly the only state to struggle with blackouts. California, which has a more tightly regulated power market, is regularly plunged into darkness during periods of high heat, winds and wildfires. Unlike Texas, much of northern California is dependent on a single utility, PG&E. The company has been repeatedly sued for dismal, dangerous management. But, as in Texas, critics have blamed intermittent renewable power for blackouts. In truth, California’s blackouts share many of the same causes as those in Texas: extreme weather, power generators that failed unexpectedly, poor planning by state regulators and an inability (in California, temporary) to import power from elsewhere. In California’s blackouts last year, solar output naturally declined in the evening. But gas plants also went offline and weak rainfall lowered the output of hydroelectric dams.

In California, as in Texas, it would help to have additional power generation, energy storage to meet peak demand and more resilient infrastructure, such as buried power lines and more long-distance, high-voltage transmission. Weather events that once might have been dismissed as unusual are becoming more common. Without more investment in electricity grids, blackouts will be, too.

The Climate Science Behind New England’s Historic Blizzard (Climate Progress)

 POSTED ON JANUARY 26, 2015 AT 3:49 PM UPDATED: JANUARY 26, 2015 AT 4:52 PM

The Climate Science Behind New England’s Historic Blizzard

sea surface temperatures

Warming-fueled sea surface temperatures provide a boost of moisture for the forecast New England blizzard, just as it has for previous monster East Coast snow storms. Via NOAA.

Another epic blizzard is bearing down on New England. There is a “big part” played by “human-induced climate change,” especially warming-fueled ocean temperatures, according to Dr. Kevin Trenberth, former head of the Climate Analysis Section at the National Center for Atmospheric Research.

I asked Dr. Trenberth to comment on the role climate change has on this latest storm, which is forecast to set records. He explained:

The number 1 cause of this is that it is winter. In winter it is cold over the continent. But it is warm over the oceans and the contrast between the cold continent and the warm Gulf Stream and surrounding waters is increasing. At present sea surface temperatures are more the 2F above normal over huge expanses (1000 miles) off the east coast and water vapor in the atmosphere is about 10% higher as a result. About half of this can be attributed to climate change.

Before this latest storm, we’ve seen a long-term pattern of more extreme precipitation, particularly in New England winters. Climate scientists had long predicted this would happen in a warming world. Here’s why.

heavy precipitation

“Percent changes in the amount of precipitation falling in very heavy events (the heaviest 1%) from 1958 to 2012″ by region,” via the 2014 National Climate Assessment. “There is a clear national trend toward a greater amount of precipitation being concentrated in very heavy events, particularly in the Northeast,” driven by a warming climate.

Like a baseball player on steroids, our climate system is breaking records at an unnatural pace. And like a baseball player on steroids, it’s the wrong question to ask whether a given home run is “caused” by steroids. As Trenberth wrote in his must-read analysis, “How To Relate Climate Extremes to Climate Change,” the “answer to the oft-asked question of whether an event is caused by climate change is that it is the wrong question. All weather events are affected by climate change because the environment in which they occur is warmer and moister than it used to be.”

One of the most robust scientific findings is the direct connection between global warming and more extreme precipitation or deluges. “Basic physics tells us that a warmer atmosphere is able to hold more moisture — at a rate of approximately 7 per cent increase per degree [Celsius] warming,” as the U.K. Met Office explained in its 2014 update on climate science. “This is expected to lead to similar percentage increases in heavy rainfall, which has generally been borne out by models and observed changes in daily rainfall.”

This means that when it is cold enough to snow, snow storms will be fueled by more water vapor and thus be more intense themselves. So we expect fewer snowstorms in regions close to the rain-snow line, such as the central United States, though the snowstorms that do occur in those areas are still likely to be more intense. It also means we expect more intense snowstorms in generally cold regions. This may appear to be counterintuitive — and certainly climate science deniers like to play up big snowstorms for that reason. But the fact is that the warming to date is not close to that needed to end below-freezing temperatures during midwinter over parts of the globe like New England, while it is large enough to put measurably more water vapor into the air.

A 2014 MIT study by Prof. Paul O’Gorman found that “snowfall extremes actually intensify” even many decades from now, in a future with high levels of warming:

O’Gorman found that there’s a narrow daily temperature range, just below the freezing point, in which extreme snow events tend to occur — a sweet spot that does not change with global warming….

“People may know the expression, ‘It’s too cold to snow’ — if it’s very cold, there is too little water vapor in the air to support a very heavy snowfall, and if it’s too warm, most of the precipitation will fall as rain.”

We’ve long known that warmer-than-normal winters favor snow storms. A 2006 study, “Temporal and Spatial Characteristics of Snowstorms in the Contiguous United States” found we are seeing more northern snow storms and that we get more snow storms in warmer years:

The temporal distribution of snowstorms exhibited wide fluctuations during 1901-2000…. Upward trends occurred in the upper Midwest, East, and Northeast, and the national trend for 1901-2000 was upward, corresponding to trends in strong cyclonic activity….

Assessment of the January-February temperature conditions again showed that most of the United States had 71%-80% of their snowstorms in warmer-than-normal years…. a future with wetter and warmer winters, which is one outcome expected, will bring more snowstorms than in 1901-2000. Agee (1991) found that long-term warming trends in the United States were associated with increasing cyclonic activity in North America, further indicating that a warmer future climate will generate more winter storms.

The U.S. Global Change Research Program (USGCRP) U.S. Climate Impacts Report from 2009 reviewed that literature and concluded, “Cold-season storm tracks are shifting northward and the strongest storms are likely to become stronger and more frequent.

So it is no surprise that a 2012 study found extreme snowstorms and deluges are becoming more frequent and more severe. The 2014 National Climate Assessment (NCA), which is the most comprehensive analysis to date of current and future U.S. climate impacts, pointed out, “The mechanism driving these changes is well understood.” The congressionally-mandated report by 300 leading climate scientists and experts, which was reviewed by the National Academy of Sciences, explains: “Warmer air can contain more water vapor than cooler air. Global analyses show that the amount of water vapor in the atmosphere has in fact increased due to human-caused warming…. This extra moisture is available to storm systems, resulting in heavier rainfalls. Climate change also alters characteristics of the atmosphere that affect weather patterns and storms.”

That final point is very important. The worst deluges have jumped not merely because warmer air holds more moisture that in turn gets sucked into major storm systems. Increasingly, scientists have explained that climate change is altering the jet stream and weather patterns in ways that can cause storm systems to slow down or get stuck, thereby giving them more time to dump heavy precipitation (see my recent literature review here).

The National Climate Assessment noted that this “remains an active research area” but pointed outthat: “Heavier-than-normal snowfalls recently observed in the Midwest and Northeast U.S. in some years, with little snow in other years, are consistent with indications of increased blocking (a large scale pressure pattern with little or no movement) of the wintertime circulation of the Northern Hemisphere.”

You can see these the remarkable swings in the fraction of annual precipitation coming from extreme deluges in New England from NOAA’s Climate Extremes Index for the past century:

CEI Winter

NOAA chart showing the percentage (times 2) of New England “with a much greater than normal proportion of precipitation derived from extreme (equivalent to the highest tenth percentile) 1-day precipitation events” during the cold season (October-March).

In the case of the blizzard bearing down on New England, we have both the extra moisture off the East Coast and an “odd configuration of the jet stream (once again) is moving the low pressure system through a pattern that will create an epic blizzard.”

What of the future? Trenberth explains, “In mid winter, it is expected with climate change that snowfalls will increase as long as the temperatures are cold enough, because they are warmer than they would have been and the atmosphere can hold 4% more moisture for every 1F increase in temperature. So as long as it does not warm above freezing, the result is a greater dump of snow.” On the other hand, “at the beginning and end of winter, it warms enough that it is more likely for rain to result.” The net result is that average total snowfall may not increase.

The 2014 MIT study provides some more regional specificity about how the future will play out in terms of average snowfall versus extreme snowfall:

The study found that, under high warming scenarios, those low-lying regions with average winter temperatures normally just below freezing would see a 65 percent reduction in average winter snowfall. But in these places, the heaviest snowstorms on average became only 8 percent less intense. In the higher latitudes, extreme snowfall became more intense, with 10 percent more snow, even under scenarios of relatively high average warming.

Of course, climate science deniers and their allies will no doubt continue to misinform the public and policymakers by arguing that monster snowstorms are somehow evidence against the theory of human caused global warming, when they are no such thing. The latest science means the deniers will continue to have increasingly intense extreme “snowmageddons” in colder regions like New England, especially in midwinter, to mislead the public for decades to come.