 -- Residents in upstate New York remain trapped inside their homes, with motorists stranded as a deadly snowstorm continues to dump snow across the region.

A lake-effect snow warning has been issued for the rest of the week in Erie County, and the New York National Guard was deployed to help the Buffalo area dig out.

The storm is blamed for the deaths of at least six people. Three of the people who died in the storm suffered heart attacks, and two of those were shoveling snow at the time, officials said.

Another person in Erie County was pinned by a car while trying to push it out of the snow, while another was found buried in his car, authorities said at a news conference today. In Genesee County, an employee died while operating a snowblower, authorities said.