The Arctic air that descended on the Northeast has brought dangerously cold sub-zero temperatures and wind chills to the region. That includes a record-setting wind chill of minus 108 degrees Fahrenheit on the summit of Mount Washington in New Hampshire. The Mount Washington Observatory at the peak of the Northeast’s highest mountain, famous for its extreme weather conditions, also recorded an actual temperature of minus 47 and tying an observatory record set in 1934. Across the rest of the region, wind chills — the combined effect of wind and cold air on exposed skin —  dropped to minus 45 to minus 50 degrees Fahrenheit on Saturday.

A growing online conspiracy theory is using the tagline “died suddenly” to baselessly claim that COVID-19 vaccines are killing people. The filmmakers and anti-vaccine activists behind the misinformation campaign have flooded social media with news reports, obituaries and GoFundMe pages about sudden deaths or injuries alongside the term “died suddenly” and syringe emojis. The media intelligence firm Zignal Labs found that the use of “died suddenly” or a misspelled version of it in tweets about vaccines have surged more than 740% in the past two months compared with the two previous months. Rigorous study and real-world evidence from hundreds of millions of administered shots prove that COVID-19 vaccines are safe and effective.

A train derailment and resulting large fire have prompted an evacuation order in an Ohio village near the Pennsylvania state line. The Friday night derailment covered the area in billows of smoke lit orange by the flames below. Rail operator Norfolk Southern says about 50 cars derailed in East Palestine from a train carrying a variety of freight. No injuries were reported. Officials say they're trying to determine which cars are still burning. An evacuation order remained in place for residents within a mile of the scene, and the local air quality is being monitored. A National Transportation Safety Board team was heading to the scene to investigate.