“...some water researchers are warning that flooding tunnels with seawater could have a devastating effect on Gaza’s already scarce freshwater supplies and might destabilize buildings. There are also concerns that flooding the tunnels could endanger many of the approximately 130 remaining Israeli hostages who were abducted by Hamas in its attacks of 7 October 2023. The hostages’ locations remain unknown. But one researcher Nature spoke to says he suspects the impact of the flooding will be limited, because Gaza’s aquifer is already contaminated by seawater.”