New Delhi, Jan. 19 -- The National Weather Service (NWS) has issued a series of urgent weather warnings across the United States, as dangerous cold, snow, strong winds and dense fog affect large parts of the country from Florida to the Great Lakes and Alaska.

According to the NWS Tampa Bay/Ruskin, a Freeze Warning and Cold Weather Advisory are in effect for parts of central and coastal Florida, including Citrus, Hernando, Levy and Sumter counties, from midnight Sunday to 9 am Monday.

Temperatures are expected to fall as low as 25degF, with wind chills near 23degF. The NWS warned that frost and freezing temperatures could damage crops, kill sensitive plants and affect outdoor plumbing. A Freeze Watch is also in place for late Monday nigh...