Sign In or Create an Account.

By continuing, you agree to the Terms of Service and acknowledge our Privacy Policy

Sparks

The South Is Smashing Electricity Records in the Dead of Winter

The Tennessee Valley Authority just set a new all-time high. Here’s why that’s a bit surprising.

Chattanooga, Tennessee.
Heatmap Illustration/Getty Images

America’s largest public power company just set a new record. The Tennessee Valley Authority said consumers used around 34,500 megawatts of electricity on Wednesday morning, about 1,000 megawatts more than its previous all-time record of around 33,500 megawatts in August 2007.

While the cold weather across much of the country has strained many power grids, especially those in the South where electric heating is more common, it’s noteworthy that TVA not only broke its winter record, but it’s all-time record as well. By contrast, the market that covers 90% of Texas, ERCOT, set a winter demand record earlier this week, but its overall record is still from this past summer.

Much of the area around the Tennessee Valley served by the Authority have seen persistent low temperatures over the past few days. Nashville has a forecast high of 30 degrees Wednesday and has gotten as cold as -1 degree Fahrenheit, only the second time the city has experienced below-zero temperatures since 1996, according to the National Weather Service.

And cold temperatures mean more electricity usage. Like much of the region, Tennesseans largely heat their homes using electricity as opposed to fuel oil or natural gas.

“Heavy snow and bitter cold temperatures are creating record high demand for electricity across the Southeast region,” the TVA said in a warning released Tuesday, asking its customers to reduce their electricity consumption from 6 am to 10 am. Similar warnings were issued by ERCOT, which also serves millions of households who heat their homes via electricity. The cold snap is expected to last through the weekend.

And like in Texas, the amount of power TVA is called upon to provide has grown as the region it serves has seen its population and economy grow.

While TVA has a relatively modest solar portfolio compared to the large and growing amounts of wind and solar in Texas, the TVA can still struggle with cold mornings. Some of this is due to what solar power it does have not being available, but it’s largely because of the nature of electricity demand in the winter. On cold days, it is especially chilly in the morning, when people are trying to heat their homes between waking up and going to work or school. By contrast, summer afternoons and early evenings are tough for grids to manage because temperatures stay high even as the sun goes down and people return to their homes and cool them and start operating appliances.

TVA’s generation mix is almost unique within the United States in that much of it is non-carbon-emitting but with relatively little wind or solar. About 60% of its power comes from carbon-free sources, which are nearly entirely its three nuclear plants and its iconic dams.

Blue
Matthew Zeitlin profile image

Matthew Zeitlin

Matthew is a correspondent at Heatmap. Previously he was an economics reporter at Grid, where he covered macroeconomics and energy, and a business reporter at BuzzFeed News, where he covered finance. He has written for The New York Times, the Guardian, Barron's, and New York Magazine.

Donald Trump and Jaws.
Heatmap Illustration/Getty Images

Former President Trump wants to know: Would you rather be electrocuted or eaten by a shark?

On Sunday, during a rally in Las Vegas, the Republican nominee floated the question for what is at least the second time this campaign season (an odd choice, perhaps, given that Nevada is hardly shark territory, and therefore his supporters there are unlikely to have given the question much thought).

Keep reading...Show less
Red
Sparks

Tornado Alley Is Moving East

New research finally sheds some light on what the heck is happening.

A tornado.
Heatmap Illustration/Getty Images

If hurricanes, wildfires, heat, and floods are the Big Four of extreme weather in America, then tornadoes are perhaps the equivalent of the National Bowling League.

That’s not for lack of fatalities — tornadoes kill more people annually than hurricanes, per the 30-year average — nor for their lack of star power (see: The Wizard of Oz, Sharknado, Twister, and my most highly anticipated movie of the year, Twisters). But when it comes to the study of extreme weather, robust, detailed data on tornadic supercells has been described as “largely absent,” at least compared to the scholarship on their more popular meteorological counterparts.

Keep reading...Show less
Blue
Sparks

A Swiss Army Knife for Clean Energy

These can really do it all — almost.

A dam.
Heatmap Illustration/Getty Images

Before and for the first year or so after the Inflation Reduction Act, clean energy in the United States was largely developed under the aegis of two tax credits: the Production Tax Credit, which primarily useful for wind power, and the Investment Tax Credit, which is primarily used for solar power. (The actual eligibility for each tax credit for each technology has changed various times over the years, but that’s the gist.)

Starting in 2025, however, and lasting (absent any change in the law) through at least 2032, that tax credit regime will be made “technology neutral.” Goodbye, existing credits with their limited applicability. Hello, new tax credits that apply to “any clean energy facility that achieves net-zero greenhouse gas emissions,” according to a release issued Wednesday by the Treasury Department.

“For too long, the U.S. solar and wind markets have been hampered by uncertainty due to the on-again-off-again nature of key tax credits,” Treasury Secretary Janet Yellen said on a call with reporters. “Periods of indecision and the credits being repeatedly allowed to elect to lapse made it too difficult for companies to plan and invest in clean energy projects.”

Keep reading...Show less
Green