Biden approved an emergency declaration for Oklahoma Wednesday night amid the winter storm that has knocked out power to millions in the region. The president approved an emergency declaration for Texas on Sunday. The authorization allows FEMA to coordinate disaster relief and provides federal funds.

"Specifically, FEMA is authorized to identify, mobilize, and provide at its discretion, equipment and resources necessary to alleviate the impacts of the emergency," a statement from the White House said. "Emergency protective measures for mass care and sheltering and direct federal assistance will be provided at 75 percent federal funding."

-ABC News' Molly Nagle

The U.S. Office of Personnel Management announced that all federal offices in Washington, D.C. are closed Thursday because of extreme weather.

A briefing at the State Department scheduled for Thursday was cancelled and the press briefing with White House press secretary Jen Psaki will be by phone. Many other government operations will continue virtually.

Biden will receive his daily intelligence briefing and a COVID-19 response briefing today, both of which are closed the the press. This comes after the president's trip to visit a Pfizer vaccine production plant in Michigan, originally scheduled for Thursday, was postponed until Friday. White House press secretary Jen Psaki will give a virtual briefing at 12:30 p.m.

On Capitol Hill, Democrats are planning to unveil an immigration reform bill, which will include immigration priorities Biden laid out on day one of his administration. The bill, which does not have bipartisan support, would establish a pathway to citizenship for undocumented immigrants in the U.S., provide more funding to alleviate the backlog of asylum cases and the border and include funding for border security.

However, it seems now the Democrats do not have the bipartisan support in Congress they'd need to pass the legislation, so questions remain if they will have to water down the bill, or pass it in many small parts. Setting aside these concerns, administration officials tell ABC News they are more concerned with getting the legislation introduced.

-ABC News' Cecilia Vega and Justin Gomez

Biden's trip to Kalamazoo, Michigan, has been rescheduled to Friday.

The visit -- in addition to his Tuesday town hall in Milwaukee -- will give Biden an opportunity to make his case for COVID-19 relief to every day Americans since taking office.

The states chosen -- Michigan and Wisconsin -- for the president to pitch his plan were critical flips for the president in the 2020 election, helping to put him in the White House.

Biden will tour a Pfizer manufacturing site in Kalamazoo and meet with workers who are producing the COVID-19 vaccine.

-ABC News' Molly Nagle