It was a typically hot summer day in Utah’s Zion national park, where early-afternoon heat hovered near 100F, even in the shadows of the red peaks soaring overhead. But the extreme conditions did little to dissuade the throngs of tourists who trudged into the chalky brown waters of the Virgin River.
The parking lot at Zion – one of the United States’s busiest national parks – had been full since 8am. Many of the visitors were there to scramble into the shallows of the Virgin River for the ever-popular and Instagrammable Narrows hike.
