US Winter Storm Prompts Power Grid Emergencies, Travel Chaos (3)

A sprawling winter storm has grounded thousands of flights around the US, triggered grid crises and knocked out power to thousands, while threatening to drop a foot of snow on New York City and the Northeast corridor Sunday.

As of late Saturday, more than 15,200 flights across the US were grounded through Monday, levels not seen since the government shutdown last year, airline tracking company FlightAware said. About 236,000 homes and businesses from Colorado to the Atlantic were without power at 3 a.m. New York time, with the bulk of them in Mississippi, Texas and Louisiana, PowerOutage.us said.

Empty queues at Dallas-Fort Worth International Airport (DFW) during a winter storm in Dallas on Jan. 24.

Photographer: Mark Felix/Bloomberg

The ...