JULY 25, 2019 / 6:17 AM / REUTERS
BAN NONG CHAN, Thailand (Reuters) – By this time of year, the Mekong River should have been rising steadily with the monsoon rains, bringing fishermen a bounty of fat fish.

Scientists and people living along the river fear the impact of the worst drought in years has been exacerbated by upstream dams raising the prospect of irreversible change on the river that supports one of Southeast Asia’s most important rice-growing regions.