By Brendan O'Brien and Rich McKay
CHICAGO (Reuters) -Tens of millions of Americans were in the pathway of dangerous and damaging weather conditions as snowstorms moved across the Northwest and Midwest, flooding threatened the East Coast and potential tornadoes were on tap in the South.
Airlines delayed more than 7,600 flights across the U.S. on Friday, including planes grounded at Chicago's O'Hare International Airport due to winds and blinding snow. In Iowa, Republican presidential candidates canceled events three days out from the state's caucuses, the first of the state-by-state contests in which parties pick their nominees ahead of November's general election.
Blizzards arrived in much of the upper Midwest on Friday morning with heavy snows and fierce winds of up to 60 miles per hour (96 kph) that were expected to continue into Saturday, the National Weather Service (NWS) warned.
More than 133,000 homes and businesses lost power in Michigan, according to data from. The lights went out for another 150,000-plus customers in Wisconsin, West Virginia, Ohio and Pennsylvania.
«This storm system is definitely dangerous,» said Zack Taylor, a meteorologist with the NWS' Weather Prediction Center in College Park, Maryland. The service cautioned against unnecessary travel, noting that visibility on some roads in Chicago was less than half a mile.
Taylor warned of risks of frostbite and hypothermia in Iowa, where temperatures for most of the state were forecast to drop below zero degrees Fahrenheit (minus 18 degrees Celsius).
The forecast for Monday in Des Moines, the state capital, was a low of minus 18 F (minus 28 C). Temperatures for Monday's caucuses, which entail long meetings in churches and school gyms, are expected to
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