AMES, IOWA (AP) -- Iowa authorities say several highways, county roads and city streets remain closed by accidents, ice, heavy snow or whiteout conditions.

The Iowa Department of Transportation said in 4 a.m. Wednesday update that westbound lanes of Interstate 80 were shut down by a multivehicle accident near Wilton in eastern Iowa.

The department also says U.S. Highway 218 is closed in both directions from Iowa City south to the Missouri line. Snow is blocking the pavement at several spots, and stuck vehicles must be removed before the roadway can be reopened.

Almost half of eastern Iowa remains under a blizzard warning. The storm is part of a 2,000-mile system that reaches from Texas to New England.

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