This once-thriving lake has all but dried up. It's a story repeated across Europe as the drought deepens

Lake Montbel is a shimmering, turquoise lake, stretching across 1,400 acres of south-west France, in the foothills of the Pyrenees -- a haven for wildlife and a vital source of water. But after the driest winter in more than six decades, it is a shadow of its former self.