Historically low water levels along Europe's second-longest river have led Hungary and Romania to reduce output at key nuclear plants. Danube tourism and river cargo have also been severely affected by Europe's heatwave.

According to the newspaper, the low water level was caused by prolonged drought and extreme heat

Historically low water levels along Europe's second-longest river have led Hungary and Romania to reduce output at key nuclear plants. Danube tourism and river cargo have also…