Flash floods wreak havoc in US south-west – but are no salve for drought

Climate experts warn temporary increases in water levels will not mitigate a crisis that has been years in the making

Flash floods hitting the American south-west in recent days have shuttered parts of national parks including in Moab and Zion, closed highways in Colorado, submerged cars in Texas and trapped tourists in a New Mexico cave. A young woman remains missing after being swept away while hiking in Zion on Friday.

But the destructive deluges have not been enough to relieve the drought and the continued pressure on water resources, experts say. Even strong storms are unable to overcome dry conditions that are decades in the making.