Tornadoes strike Detroit and east coast as heatwave blankets US south-west

Child killed and mother critically injured in Michigan when twister uprooted a tree and sent it crashing into their home

A two-year-old boy was killed and his mother critically injured after a fast-developing tornado struck and caused a tree to fall on their home in the suburban Detroit city of Livonia on Wednesday.

Meanwhile, tornadoes also struck in Maryland on the east coast and a brutal heatwave affected the south-west and California as extreme weather continued to mark the start of summer in the US.