The weather disaster in Texas is gaining new urgency, with many people fighting to survive in their own homes. There are still widespread power outages for a fourth day in a row, though it has been restored in many areas. The food supply is disrupted in parts of the state, causing scarcity at some food banks and grocery stores. And now, nearly a quarter of Texans are under boil water advisories because treatment plants are down. As Texans suffer, politicians and power industry officials are blaming each other for the failure. A study says the COVID variant first found in South Africa reduces antibody protection from the Pfizer vaccine by about two-thirds. Pfizer says there's still no clinical evidence its vaccine is less effective against the variant, but they are working on a booster shot. CBS News has learned the White House and congressional Democrats will unveil a bill today that would reshape the laws to provide a long-promised path to citizenship for most of the undocumented in this country. Many leading Republicans are paying tribute to conservative radio icon Rush Limbaugh, who died of lung cancer yesterday.

Climate reporter Kendra Pierre-Louis joins CBS News meteorologist and climate specialist Jeff Berardelli to discuss transitioning to a Greener economy, environmental justice and carbon off-sets. They discuss the impact President Joe Biden proposals to combat climate change may have, including returning to the Paris Climate Agreement and rejecting the Keystone Pipeline. Pierre-Louis, who is the author of "Green Washed: Why We Can't Buy Our Way to a Green Planet," explains why we need to prepare for climate migration and improve the country's infrastructure. Pierre-Louis can now be heard on the Gimlet podcast “How to Save the Planet."

Nearly three million Texans are without power this morning, two days after a deadly ice storm. Many are facing sub-freezing temperatures, which are life-threatening if you can't stay warm. Oklahoma is also facing brutal wind and snow. President Joe Biden held a town hall in Wisconsin last night, answering quite a few questions about the pandemic. Mr. Biden made a big promise when it comes to vaccinations. Dr. Anthony Fauci joins us to discuss the timetable the president set for when a COVID vaccine will be available to every American.

Breaking news overnight from North Carolina, where a confirmed tornado killed at least three people and injured at least 10 more in Brunswick County, in the southeastern part of the state. That tornado is part of a dangerous weather system wreaking havoc across much of the country. More than 115 million Americans will be under winter weather alerts as another storm system approaches. More than four million people have lost electricity across the South, mostly in Texas, where an ice storm and bitter cold have forced rolling blackouts. The mayor of Austin, Steve Adler, joins us to discuss the difficulties facing his residents. A 9-11 style commission will be established to investigate last month's assault on the Capitol. There's been a dramatic downturn in coronavirus cases and deaths.

Before Bubba Wallace, Bill Lester was the last driver to compete on a regular basis at the top levels of NASCAR – that was in the early 2000s. Lester tells CBS News' Jericka Duncan why he decided to pursue a career in racing in his late 30s after a successful career as an engineer at Hewlett Packard. Lester's new memoir is Winning in Reverse Defying the Odds and Achieving Dreams, which is published by Pegasus, an imprint of Simon and Schuster, a division of ViacomCBS.

Texas is now in a state of emergency, after some areas saw their first snowfall in years and the coldest temperatures in decades. That system is moving into the Midwest and Northeast, covering roads in snow and causing major problems for drivers. The debate over masks and the coronavirus is entering a new phase - multiple states have recently dropped their mask mandates, against the advice of the CDC. The Republican party is at a crossroads, after Saturday's vote to acquit former President Trump of inciting an insurrection. Senator Mitch McConnell voted to acquit the former president on constitutional grounds, but he made clear in his blistering remarks that Mr. Trump could face criminal charges for his role in inciting violence, and said that even former presidents are not immune from prosecution.

The CDC plans to unveil long-awaited guidelines today for reopening K through 12 schools, and we have details first from a draft internal summary obtained by CBS News. The defense will take center stage today in former President Trump's impeachment trial over the assault on the Capitol. This should be Mardi Gras weekend in New Orleans, but police are cracking down to prevent another jump in coronavirus cases. 65 million Americans are under winter weather alerts. A deadly Texas pile-up shows the dangers of a brutal weekend of weather ahead. This week's "60 Minutes" investigates one of the most sophisticated cybersecurity breaches in U.S. history. Investigators believe Russia is behind the massive hack that hit several federal agencies, including the Treasury, Commerce, and Justice departments.

Oscar winner Fisher Stevens discusses directing the new Apple TV + film "Palmer" with CBS News' Jamie Wax. He shares how they were able to shoot the film in just 25 days and why the relationship between Justin Timberlake and his young co-star was key. Stevens tells Wax why it was important to create the feeling of a theater company on set, similar to the dynamic on the set of HBO's hit series "Succession" - in which Stevens is currently stars in as a series regular. He also shares his reaction to the blockbuster success of "Tiger King," which he executive produced.

The assault on the Capitol on January 6th shook America. We all thought we knew what happened during the attack. But yesterday, during former President Trump's second impeachment trial, we got to see and hear moments that give new perspective on that terrible day. We'll get more arguments today from House impeachment managers, making the case against Mr. Trump. One million coronavirus vaccine doses are on their way to pharmacies across the U.S., part of a new federal program to expand access. Dr. Ashish Jha joins us to discuss the coronavirus vaccines and variants.

As we continue to mark Black History Month, the great-granddaughter of Ida B. Wells and author of "Ida B. the Queen: The Extraordinary Life and Legacy of Ida B. Wells" Michelle Duster joins CBS News' Adriana Diaz to discuss the life and legacy of the pioneering journalist and anti-lynching crusader.