400,000 without power as Hurricane Matthew scrapes Florida coast

Hurricane Matthew has spun dangerously close to Florida's Atlantic coast, scraping the shore with howling wind and heavy rain and leaving more than 400,000 without power.

Matthew was downgraded to a Category 3 hurricane overnight with the strongest winds of 120mph just offshore as the storm pushed north around dawn, threatening more than 500 miles of coastline in Florida, Georgia and South Carolina.