Florida Gov. Charlie Crist signed an executive order giving various state agencies the authority to provide growers with assistance. Across central and south Florida, farmers were trying to salvage millions of dollars' worth of vegetable and citrus crops, spraying them in protective layers of ice and covering them in plastic.
Forecasters said the Southern deep freeze would probably break records for continuous cold in many parts of Florida and elsewhere.
The eastern U.S. was not only dealing with subfreezing temperatures, but parts of New England were under record snowfall. In Burlington, a storm dumped more than 33 inches, breaking a single-storm record of nearly 30 inches set in 1969.
In northeast Ohio, forecasters said snow would continue to fall in areas that already have 2 feet or more on the ground. The National Weather Service said areas in the region's "snow belt" could receive up to 8 more inches of lake-effect snow on Tuesday.
Four deaths were blamed on the cold in Tennessee.