A massive storm system that brought numerous tornadoes has killed at least 21 people across the United States. High winds are still expected as the storms move northeast.

Last weekend, the US was hit by a cluster of perhaps the most devastating tornadoes in its history. In Kentucky alone, more than 70 people are known to have been killed by the severe weather system, and deaths were also reported in Arkansas, Illinois, Missouri and Tennessee. US President Joe Biden, who has signed a disaster declaration for Kentucky, paid a visit to the region and called the situation there "an unimaginable tragedy". We take a closer look at the scale of the damage.

Kentucky Governor Andy Beshear said about 50 had died in his state alone, bringing the suspected death toll across ravaged states to 64. So far, 60 workers presumed dead at a candle factory were located.

Governor Andy Beshear said there could be 80 or more people dead, as many people remain missing after a series of severe storms ripped through the state over the weekend. Thousands remain without heat or water.

At least five people were killed and about 50 people injured when tornadoes tore through Van Zandt County, some 60 miles east of Dallas.