"Bracing for Record-Breaking Arctic Freeze Across the US"

Brutally cold temperatures and dangerous wind chills continue to affect much of the US, with about 150 million Americans under windchill warnings or advisories. The storm has caused power outages, travel delays, and fatalities, including deaths from suspected hypothermia and accidents related to the extreme weather. The cold has also impacted presidential caucuses in Iowa and led to flight cancellations and delays across the country. Swirling snow and avalanche dangers prompted road closures in the Rocky Mountains, while the storm is expected to continue affecting travel and bringing snow to the Mid-Atlantic and Northeast.