While most of the United States is currently under a deep freeze, real estate markets in many cities across the country are heating up, according to the recent Hotness Index compiled by realtor.com®. Not surprisingly, warm locations continue to be hot spots for winter buyers. Miami, Las Vegas, Phoenix, Raleigh, and San Diego rank highest on the Hotness Index, and see busy Spring level home-buying activity earlier than other cities across the country.  http://bit.ly/Hottest-Winter-Home-Markets