Experts say Europe's heatwaves this summer have been "exceptional", causing riverbeds across the continent to dry up. Now the flow-on effects are being felt economically.

Europe's record temperatures this summer has led to several relics from the past re-emerging from the continent's major rivers.

Exceptionally low river levels in a Europe hit hard by drought and record heat have plunged transporters into turmoil this summer, driving up costs that everyday consumers could…