Utahns still shivering, Page B1.The record cold wave pressed southward and eastward Saturday, threatening crops in southern Texas and California and covering highways with deadly sheets of ice across the Plains and Midwest.

Temperatures fell to more than 40 degrees below zero in places, the National Weather Service said.Utilities fought to restore electricity and gas service to thousands of shivering customers.

In sharp contrast to the cold and snow, the East still had mild weather. Boston hit a record 62 Saturday morning. Heavy rain and flooding forced the evacuations of more than 90 people across Tennessee on Saturday, state emergency officials said.

Tornadoes swirled around Mississippi for the third straight day Saturday as crews tried to assess damage and start cleanup from Friday's twisters, which killed two people and injured many more.

Including those fatalities, at least 24 deaths had been blamed on the weather since Tuesday, the majority in traffic accidents on slippery roads.

Denver hit a record low Saturday of 25 below zero; the city had been below zero since Wednesday evening. In northern Nevada, Winnemucca dropped to 37 below, the coldest ever registered there in more than 100 years of records. Los Angeles hit a record 33. The Idaho mountain town of Stanley hit a low of 46 below zero.

In South Dakota, there were unofficial overnight lows of 45 below at Deerfield in the Black Hills and at Porcupine on the Pine Ridge Indian Reservation. Cheyenne, Wyo., tied its record low of 28 below, then by noon warmed to 2 below, warmest point in the state.

In southern Arizona, the desert city of Tucson had snow flurries.

The arctic air hit the Chicago area during the night, sending temperatures tumbling from the mild 40s Friday evening to the teens Saturday morning, and highways throughout the state were icy.

In California, the heavily farmed San Joaquin Valley had record lows ranging from 19 at Fresno to the teens in the Bakersfield area, the weather service said.

An Amtrak passenger train carrying 300 people was stuck in Devils Lake, N.D., for three hours Saturday morning when the fuel in the engines froze.