WASHINGTON (AFP) - A huge blizzard dumped a blanket of thick snow over the US east coast Saturday, paralysing the region and snapping power lines to thousands of people as hazardous roads killed at least two. The monster storm, dubbed Snowpocalypse and Snowmageddon, stretched thousands of miles from eastern Indiana into Pennsylvania and then down through Maryland as far south as North Carolina. With winds gusting at almost 90km an hour, many places were covered in more than a foot of snow by early Saturday. Even US President Barack Obama awoke to find 10 inches covering the White House grounds. Forecasters warned residents to hunker down with no let-up in the weather for most of the day, predicting a record-breaking, historic total snowfall in some places of 36 inches. Its pretty rough out there, Ed McDonough from the Maryland Emergency Management Agency told AFP. The roads are very difficult to travel... and we are seeing a spike in power outages. We are telling local residents to stay home, enjoy the time with their families and let the highway crews do their work. He said 150,000 people were without power in the state, which along with neighbouring Virginia and the capital Washington, bore the brunt of the bad weather. Some 200 National Guardsmen had been deployed across the state helping emergency services, he added, but so far many people seemed to have heeded warnings to stay off the roads. Virginia police confirmed that a father and son were killed Friday when they stopped to help a car that had spun out of control. The two were hit by a tractor-trailer that jack-knifed into them on a busy highway. Virginia state police are working numerous traffic crashes and responding to multiple disabled vehicles as the winter storm makes its way across the state, the police said in a statement. In the normally bustling capital, the streets had been transformed into a deserted winter wonderland early Saturday as workers with snow-blowers struggled to clear the sidewalks. Meanwhile, one of the regions main electricity supplier, Pepco was struggling to get services restored to its 85,000 customers left without power. We have a lot of scattered outages and the road conditions are not really working with us, admitted Pepco spokesman Andre Francis, pleading for some patience from customers. The National Weather Service (NWS) has put the Washington-Baltimore metropolitan area under a rare 24-hour blizzard warning until 10:00 pm Saturday (0300 GMT Sunday). All flights out of the capitals Reagan National airport were cancelled, along with most flights out of Dulles International Airport in Virginia, while there was a limited service at Baltimore. The snowfall may shatter Washingtons 88-year-old record snowfall of 28 inches in the 1922 Great Knickerbocker Storm, when the Knickerbocker Theatre collapsed killing nearly 100 people. The capitals subway system has shut down 40 above ground stations, as acting deputy general manager Dave Kubicek warned the service was fast-reaching the point where we risk trains becoming stranded on snow-covered tracks. The measure snapped transport links between Washington and its outlying suburbs with most of the major roads impassable meaning bus services were also knocked out. The governors of Virginia, Maryland and Delaware have declared states of emergency, a move that puts the National Guard on alert. Delaware Governor Jack Markell ordered all vehicles off the roads starting at 10:00 pm (0300 GMT Saturday). Desperate last-minute shoppers had besieged supermarkets Friday to stock up on provisions, as official warnings blared on radio and television urging residents to be prepared to stay inside for up to five days. By the early afternoon the normally vibrant Washington was close to a ghost town, with federal employees scurrying home as snow began to fall.