Frozen iguanas drop from trees in Florida

Millions of people hunkered down against a deep freeze Sunday to ride out the winter storm that has killed at least 34 people across the United States and is expected to claim more lives after trapping some residents inside houses with heaping snow drifts and knocking out power to tens of thousands of homes and businesses.

The scope of the storm has been nearly unprecedented, stretching from the Great Lakes near Canada to the Rio Grande along the border with Mexico.In Tampa, Florida, the thermometer plunged below freezing for the first time in almost five years.About 60% of the U.S. population faced some sort of winter weather advisory or warning.