By Aya Elamroussi, Derrick Hinds, Travis Caldwell, Maureen Chowdhury, Aditi Sangal and Tori B. Powell, CNN
From CNN's Joe Sutton
More than 1.7 million customers across the United States are still without power amid the winter weather and frigid temperatures.
At least 1,757,913 customers are in the dark as of 9:30 a.m. ET on Saturday, according to PowerOutage.US.
Here's a breakdown in terms of national regions:
From CNN's Ashley Killough and Ed Lavandera
As freezing temperatures from a coast-to-coast winter storm arrive in El Paso, Texas, some migrants who haven’t turned themselves in to border agents or officials after crossing the US-Mexico border are having a difficult time finding shelter.
El Paso is in the midst of a declared state of emergency over thousands of migrants living in unsafe conditions, as a former President Donald Trump-era border policy keeping migrants out of the US remains in flux amid court proceedings.
The city has opened government-run shelters at its convention center, hotels and several unused schools, but is unable to accept migrants who don’t have documentation from Customs and Border Protection, said El Paso city spokesperson Laura Cruz Acosta.
The city must follow state and federal policies, which she said require migrants to have documentation in order to receive shelter at government-run facilities.
If undocumented migrants show up at government-run sites, they are connected with Customs and Border Protection to start the process of turning themselves in, or are connected with shelters run by nongovernmental organizations on the ground, she said.
As dangerously cold temperatures arrive this week, US border officials are warning migrants seeking to enter the country of the dire weather.
“Extremely cold, below freezing temperatures are expected along the Mexico and United States border during the next several days,” Hugo Carmona, acting associate chief of US Border Patrol Operations, said in a video statement. “Do not risk your life and that of your loved ones trying to cross the river or the desert. Help avoid human death and tragedy, stay home or remain in a safe shelter. This is a warning of extreme importance.”
Read more here and watch how migrants are coping with below freezing temperatures, in the video below:
From CNN's Jacqueline Howard
If you are in the path of the winter storm, here are some tips for staying safe indoors and outdoors as temperatures drop.
Tips to stay safe indoors When staying indoors during cold temperatures or the winter storm, the US Centers for Disease Control and Prevention offers these tips:
“Never using generators, gas or charcoal grills, camp stoves, or similar devices inside your home, in basements, in garages, or near windows,” the CDC says. “The fumes are deadly.”
Using the stove for heat is not safe, the CDC warns; instead, use extra blankets, sleeping bags or coats. A well-maintained fireplace or a portable space heater may be a safe alternative.
Tips to stay safe outdoors When venturing outdoors, the CDC and National Weather Service have some recommendations:
From CNN's Aya Elamroussi
More than 1.6 million homes and businesses nationwide were without power on the morning of Christmas Eve, thanks to an Arctic blast and winter storm that tore down power lines with destructive winds and heavy snow and dipped temperatures dangerously low – conditions killing at least 15 people.
As bone-chilling air continues to grip the US this holiday weekend, the unrelenting storm is pummeling the Midwest and parts of the East with heavy snow, blizzard conditions and even flooding along the Northeast coast. No letup is in sight until the end of Christmas Day.
At least 15 people have died since Wednesday across four states, a result of how dangerous and life-threatening conditions have been this week over a large swath of the country.
Here’s what else you can expect this Christmas Eve:
CNN’s Britley Ritz, Amanda Watts, Tina Burnside, Ray Sanchez, Eric Levenson, Taylor Ward and Nicki Brown contributed reporting to this post.
From CNN’s Rebekah Riess
The extreme winter weather continues to impede holiday travel plans, as there are more than 1,600 flight cancellations nationwide on Saturday morning, according to the flight tracking site FlightAware.
More than 1,800 flights have also been delayed so far on Saturday.
These airports have been the most affected:
From CNN's Joe Sutton
At least 15 people have died across the United States as the extreme winter weather continues to impact millions of Americans.
Here's a look at details on the deaths:
CNN's Amanda Musa, Caroll Alvarado, Tina Burnside, Raja Razek and Rebekah Riess contributed reporting.
The number of power outages in the US rose dramatically in the last few hours.
More than 1.6 million utility customers were without power as of about 7:50 a.m. ET, according to utility tracker PowerOutage.us. That's up from 840,000 customers at 4 a.m. ET.
The outages at 7:50 a.m. ET included:
Strong winds with gusts of 30-50 mph are forecast for much of the Midwest and Northeast Saturday, which could lead to additional outages.
The loss of power comes as many states are experiencing subzero temperatures, and hazardous road conditions make it difficult for crews to respond quickly.
From CNN's Rebekah Riess and Jason Hanna
Tennessee residents will see intermittent power interruptions Saturday because the frigid weather is putting a strain on the capacity of the state's federally owned electricity provider, utilities in the state said.
The Tennessee Valley Authority, which provides power to more than 150 utilities throughout the state and parts of six surrounding states, told the utilities they must intermittently interrupt electricity service to customers, the utilities said.
The Nashville Electric Service told customers Saturday morning to expect “rotating, intermittent power outages” in about 10-minute increments every 90 minutes to two hours. CDE Lightband, a power company in Clarksville, Tennessee, said power would be interrupted in 15-minute intervals.
Customers should conserve as much energy as possible, CDE Lightband said. The rolling outages are expected to last until the power load is stabilized, the Nashville Electric Service said.
From CNN's Haley Brink
More than 175 million people in the US remain under wind chill alerts Saturday morning, which include both wind chill warnings and advisories.
The wind chill alerts extend from Montana down to Florida, including metro areas such as Minneapolis, St. Louis, Atlanta, Houston and Washington, DC.
The coldest wind chills Saturday morning remain across the Midwest, where temperatures are feeling like minus 20 to minus 30 degrees. Places as far south as Atlanta are experiencing negative wind chills early Saturday.
While wind chill alerts will remain for some areas Christmas morning, they are not expected to be as widespread as Saturday and have been this week. Temperatures are forecast to start rebounding for most areas Sunday through much of next week.