Usa news: Temperatures were expected to moderate across the eastern and midwest United States on Tuesday, after days of freezing weather from ‘the blizzard of the century’ left at least 49 dead and caused Christmas travel chaos.

Blizzard conditions persisted in parts of the northeastern US, the stubborn remnants of a sprawl of extreme weather that gripped the country over several days, causing widespread power outages, travel delays and deaths in nine states, according to official figures.

In New York state, authorities described ferocious conditions, particularly in Buffalo, with hours-long whiteouts, bodies being discovered in vehicles and under snow banks, and emergency personnel going ‘car to car’ searching for survivors.

The perfect storm of fierce snow squalls, howling wind and sub-zero temperatures forced the cancelation of more than 15,000 US flights in recent days, including nearly 4,000 on Monday, according to tracking site Flightaware.com.