The Next Round of Bitter Cold and Snow will Hit the Southern US

The next round of bitter cold was set to envelop the southern U.S. on Tuesday, after the first significant winter storm of the year blasted a huge swath of the country with ice, snow and wind.

The immense storm system brought disruption even to areas of the country that usually escape winter’s wrath, downing trees in some Southern states, threatening a freeze in Florida and causing people in Dallas to dig deep into their wardrobes for hats and gloves.

By early Tuesday, wind chill temperatures could dip into the teens to low 20s (as low as minus 10.5 C) from Texas across the Gulf Coast, according to the National Weather Service. A low-pressure system is then expected to form as soon as Wednesday near south Texas, bringing the potential of snow to parts of the state that include Dallas, as well as to Oklahoma, Arkansas and Louisiana.

The polar vortex that dipped south over the weekend kept much of the country east of the Rockies in its frigid grip Monday, making many roads treacherous, forcing school closures, and causing widespread power outages and flight cancellations.

Ice and snow blanketed major roads in Kansas, western Nebraska and parts of Indiana, where the National Guard was activated to help stranded motorists. The National Weather Service issued winter storm warnings for Kansas and Missouri, where blizzard conditions brought wind gusts of up to 45 mph (72 kph). The warnings extended to New Jersey into early Tuesday.

A Kentucky truck stop was jammed with big rigs forced off an icy and snow-covered Interstate 75 on Monday just outside Cincinnati. A long haul driver from Los Angeles carrying a load of rugs to Georgia, Michael Taylor said he saw numerous cars and trucks stuck in ditches and was dealing with icy windshield wipers before he pulled off the interstate.

“It was too dangerous. I didn’t want to kill myself or anyone else,” he said.

The polar vortex of ultra-cold air usually spins around the North Pole, but it sometimes plunges south into the U.S., Europe and Asia. Studies show that a fast-warming Arctic is partly to blame for the increasing frequency of the polar vortex extending its grip.

Temperatures plunge across the country The eastern two-thirds of the U.S. dealt with bone-chilling cold and wind chills Monday, with temperatures in some areas far below normal.

A cold weather advisory will take effect early Tuesday across the Gulf Coast. In Texas’ capital of Austin and surrounding cities, wind chills could drop as low as 15 degrees (minus 9.4 C).

The Northeast was expected to get several cold days.

Transportation has been tricky Hundreds of car accidents were reported in Virginia, Indiana, Kansas and Kentucky, where a state trooper was treated for non-life-threatening injuries after his patrol car was hit.

Virginia State Police responded to at least 430 crashes Sunday and Monday, including one that was fatal. Police said other weather-related fatal accidents occurred Sunday near Charleston, West Virginia, and Monday in Winston-Salem, North Carolina. Kansas saw two deadly crashes over the weekend, The AP reported.

More than 2,300 flights were canceled and at least 9,100 more were delayed nationwide as of Monday night, according to tracking platform FlightAware. Ronald Reagan Washington National Airport reported that about 58% of arrivals and 70% of departures had been canceled.

A record 8 inches (more than 20 centimeters) of snow fell Sunday at the Cincinnati/Northern Kentucky International Airport, leading to dozens of flight cancellations that lingered into Monday. About 4 inches (about 10 centimeters) fell Monday across the Cincinnati area, where car and truck crashes shut at least two major routes leading into downtown.

More snow and ice are expected In Indiana, snow covered stretches of Interstate 64, Interstate 69 and U.S. Route 41, leading authorities to plead with people to stay home.

“It’s snowing so hard, the snow plows go through and then within a half hour the roadways are completely covered again,” State Police Sgt. Todd Ringle said.

The Mid-Atlantic region had been forecast to get another 6 to 12 inches (15 to 30 centimeters) of snow on Monday. Dangerously cold temperatures were expected to follow, with nighttime lows falling into the single digits (below minus 12.7 C) through the middle of the week across the Central Plains and into the Mississippi and Ohio valleys.

In North Texas, 2 to 5 inches (about 5 to 13 centimeters) of snow was expected beginning Thursday, according to the National Weather Service. Snow could also hit Oklahoma and Arkansas, with some parts potentially getting more than 4 inches (about 10 centimeters).

Classes canceled in several states School closings were widespread, with districts in Indiana, Virginia, Kentucky, Missouri and Kansas canceling or delaying the start of classes Monday. Among them was Kentucky’s Jefferson County Public Schools, which canceled classes and other school activities for its nearly 100,000 students.

Classes were also canceled in Maryland, where Gov. Wes Moore declared a state of emergency Sunday and announced that state government offices would also be closed Monday. Government offices also were closed Monday in Kentucky, where Gov. Andy Beshear declared a state of emergency.

Tens of thousands are without power Many were in the dark as temperatures plunged. More than 218,000 customers were without power Monday night across Kentucky, Indiana, Virginia, West Virginia, Illinois, Missouri and North Carolina, according to electric utility tracking website PowerOutage.us.

In Virginia’s capital city, a power outage caused a temporary malfunction in the water system, officials said Monday afternoon. Richmond officials asked those in the city of more than 200,000 people to refrain from drinking tap water or washing dishes without boiling the water first. The city also asked people to conserve their water, such as by taking shorter showers.

City officials said they were working nonstop to bring the system back online.

Freshwater environments cover about 1% of Earth's surface while accounting for more than 10% of known species. Like many marine and terrestrial ecosystems, however, they are in distress. A new study looking at some of the denizens of freshwater habitats offers a stark illustration of this biodiversity predicament.

Researchers assessed the status of 23,496 species of freshwater animals in groups including fishes, crustaceans such as crabs, crayfish and shrimp and insects such as dragonflies and damselflies, finding 24% of them at a high risk of extinction, Reuters reported.

"Prevalent threats include pollution, dams and water extraction, agriculture and invasive species, with overharvesting also driving extinctions," said conservationist Catherine Sayer, lead author of the study published on Wednesday in the journal Nature.

Sayer heads the freshwater biodiversity unit at the International Union for Conservation of Nature (IUCN), the organization that tracks the status of species globally.

Some of the freshwater species deemed at high risk bear exotic names such as the mini blue bee shrimp of Sulawesi, the Seychelles duskhawker dragonfly, the Atlantic helicopter damselfly of Brazil, the daisy burrowing crayfish of Arkansas and fishes such as the shortnose sucker of Oregon and California and the humpbacked mahseer of India.

The study filled a gap in data on freshwater biodiversity. The studied species were selected because their diverse positions within food webs present a holistic view of the health of freshwater ecosystems globally.

These species inhabit inland wetlands such as lakes, rivers, swamps, marshes and peatlands - areas that the researchers said have been reduced by more than a third since 1970. Other research has documented the status of mammals, birds, reptiles and amphibians that share these freshwater ecosystems and often face their own unique threats.

Of the animal groups investigated in the new study, the highest threat levels were documented in the crustaceans (30% threatened) followed by the fishes (26%) and the dragonflies and damselflies (16%).

"Freshwater ecosystems are ecologically important because of the diversity of species they support. Some of them may have high numbers of species that are restricted just to those systems - a single lake or pool or river," said Northern Arizona University freshwater conservationist Ian Harrison, a member of the IUCN Species Survival Commission and a study co-author.

"They are also important in terms of the ecosystem services they supply: carbon sequestration in terms of peat bogs; food in terms of fisheries; medicines from plants; as well as cultural and aesthetic values. Freshwater reeds are used for building houses in some areas. Freshwater ecosystems contribute $50 trillion in value annually by their provision of natural processes supporting human well-being," Harrison said.

The researchers identified four places globally with the largest number of threatened freshwater species: Lake Victoria in Africa, Lake Titicaca in South America and regions in western India and Sri Lanka.

Lake Victoria, the world's second-largest freshwater lake by surface area, is bordered by Kenya, Tanzania and Uganda. The key threats identified to species were pollution, overfishing, agriculture and invasive species, particularly the Nile perch and water hyacinth. Lake Titicaca is situated on the border between Peru and Bolivia in the Andes. It was found to face a similar cadre of threats as Lake Victoria. Both lakes boast a rich diversity of fishes.

"There is an urgent need to focus on freshwater conservation to halt the decline in species, and this can be achieved through a more integrated management of water resources that can include the maintenance of ecosystem functions within the process of addressing the obviously important human needs for water," Harrison said.

"The particular value of this study is that it shows us which river basins, lakes, et cetera, are the ones where the conservation challenges are most urgent and serious," Harrison added. "And we can compare this to what we know about existing protections, and identify where there are gaps and where there are conservation needs. And it acts as a baseline of information from which we can track progress, to see if our actions are reducing threats."

The Next Round of Bitter Cold and Snow will Hit the Southern US