State of emergency in California from intense rainfall; Search for a cause in deadly nursing home explosion; Christmas celebrations return to Bethlehem; and more on tonight's broadcast. 

The northeast is bracing for the biggest snowfall it's seen in years, as the winter storm coming across the US is already causing widespread delays and cancellations at major airports. NBC News' Sam Brock has the story. New video shows the dramatic moments where police say a man pulled a Washington state police lieutenant out of her unmarked car, then took off in the vehicle. The miles-long chase stopped when police rammed the allegedly stolen cruiser. NBC News' Jesse Kirsch reports. Warnings tonight about exposure to the measles for travelers going through Boston and Denver. It comes as cases rise in South Carolina and all at a time when HHS Secretary Robert F. Kennedy Jr. is making moves to change vaccine schedules overall for infants. NBC News' Jesse Kirsch reports. An NBC News investigation looked into the risk posed by rechargeable batteries onboard planes. The FAA reports a potential record number of lithium-Ion incidents this year even though most airlines don't carry the certified burn bags to contain a fire. Here's NBC News' Tom Costello. The president ordered the strikes on militants he accused of "slaughtering" Christians in Nigeria. Meanwhile, President Trump is expected to host Ukrainian President Zelenskyy for peace talks on Sunday. NBC News' Julie Tsirkin reports. Much of California is still digging out after days of torrential rain, floods and mudslides. NBC News' Dana Griffin is in hard-hit Wrightwood, where cleanup is just beginning. This year, many stores are making it a little harder to get a full refund on your holiday gift return. Experts say the biggest way to avoid extra costs is to return your gifts in-store. NBC News' Brian Cheung reports. In San Diego, a stranger asked Janae, a mom of four, for help wrapping a gift. When she did, the man actually gave the cash gift to her, as a thank you for her kindness. The man turned out to be Jesus Morales, a content creator with millions of followers. Janae's act of kindness is now going far beyond this one gift. NBC News' Gadi Schwartz has the story.