At least 100 people were feared dead in Kentucky after a swarm of tornadoes tore a 200-mile path through the U.S. Midwest and South, demolishing homes, levelling businesses and setting off a scramble to find survivors beneath the rubble, officials said Saturday.

The powerful twisters, which weather forecasters say are unusual in cooler months, destroyed a candle factory and the fire and police stations in a small town in Kentucky, ripped through a nursing home in neighbouring Missouri, and killed at least six workers at an Amazon warehouse in Illinois.

Kentucky Governor Andy Beshear said the collection of tornadoes was the most destructive in the state’s history. He said about 40 workers had been rescued at the candle factory in the city of Mayfield, which had about 110 people inside when it was reduced to a pile of rubble.

The rescue efforts will focus in large part on Mayfield, home to some 10,000 people in the southwestern corner of the state where it converges with Illinois, Missouri and Arkansas.

Video and photos posted on social media showed brick buildings in downtown Mayfield flattened, with parked cars nearly buried under debris. The steeple on the historic Graves County courthouse was toppled and the nearby First United Methodist Church partially collapsed. MAYFIELD, Ky., Dec 11 (Reuters)