This drone photo taken on Aug. 7, 2026 shows stranded cargo ships on the Danube river near Sarengrad, Croatia. Shipping on the Danube was severely affected by historically low water levels of the river. (David Jerkovic/PIXSELL via Xinhua)

This drone photo taken on Aug. 7, 2026 shows stranded cargo ships on the Danube river near Sarengrad, Croatia. Shipping on the Danube was severely affected by historically low water levels of the river. (David Jerkovic/PIXSELL via Xinhua)

This drone photo taken on Aug. 7, 2026 shows stranded cargo ships on the Danube river near Sarengrad, Croatia. Shipping on the Danube was severely affected by historically low water levels of the river. (David Jerkovic/PIXSELL via Xinhua)

This drone photo taken on Aug. 7, 2026 shows stranded cargo ships on the Danube river near Sarengrad, Croatia. Shipping on the Danube was severely affected by historically low water levels of the river. (David Jerkovic/PIXSELL via Xinhua)