The Transcanyon Waterline traverses terrain so rugged that helicopters are often required to make basic repairs. Park officials say roughly 40% of the 12.5-mile-long line was damaged or destroyed.

THE murderous flash floods in Nepal last week did not happen without any warning. We are shocked by its scale of devastation and thousands of dead or missing. Yet, scientists and engineers had warned ...

The US has experienced a spate of flash flood emergencies during the past two weeks, illustrating July’s dangerous side. The month has featured multiple 1,000-year rainfall events across the US, and ...