Yet more severe weather struck Thursday in the US south-west as the Four Corners region surveyed blown-away roofs, trees knocked on to homes and power lines downed from overnight tornadoes that injured one person.

The injuries weren’t life-threatening but rare for an area better known for scalding heat. But this fall has been unusually soggy in the south-west with El Niño conditions that have sent one tropical system after another in from the Pacific, causing the Grand Canyon and surrounding deserts to rage with floods.

Now, golf ball-size hail and tornadoes have joined the mix. National Weather Service meteorologists suspect at least three tornadoes touched down as storms swept across central Arizona late Wednesday.

The nasty weather hit during Lenna Landy’s yoga routine in Overgaard, a community of about 3,000 people 140 miles (225km) north-east of Phoenix.…