Fallen limbs and tree branches, sagging under ice, line a residential street in Springfield, Mo., on Saturday. An overnight ice storm left an estimated 90 percent of the city without power.

SPRINGFIELD, MO. ? A crippling winter storm lashed the central part of the nation with another blast of freezing rain, sleet and snow Saturday, causing widespread power outages and tying up highways and airports.

The storm was expected to continue through the weekend, laying down a coat of ice and snow from Texas to Illinois, where an ice storm warning was in effect through Monday morning.

Farther west, frigid arctic air reached as far south as southern and central California, where plunging temperatures prompted worry about the homeless and crops.

The storm in the Midwest had been blamed for at least seven deaths, and brought Amtrak service in Missouri to a halt on Saturday. Trees and other debris knocked down by the weight of ice blocked tracks at several locations between St. Louis and Kansas City.

Between 60,000 and 70,000 customers were without power in Springfield, Mo., Saturday, plus an unknown number of homes and businesses in surrounding towns, said Jenny Fillmer Edwards, spokeswoman for the Springfield-Greene County Office of Emergency Management.

Roads in southwest Missouri began freezing after sunset. More than 6 inches of rain fell in places across central Texas, causing local flooding. Water also blocked three highways in southeastern Oklahoma, the Department of Transportation reported.

About 300 flights were canceled Saturday at Dallas-Fort Worth International Airport, spokesman David Magana said. Cancellations also were reported in St. Louis, Kansas City, Oklahoma City and Tulsa.