More explosions were heard today in Indian-controlled Kashmir, as New Delhi and Islamabad have repeatedly accused each other of launching aerial attacks. Follow for live updates.

India has threatened before, in other moments of rising tensions, to pull out of the Indus Waters Treaty, which both countries signed in 1960. If India follows through this time, it could restrict the flow of water that is used for most of Pakistan’s crop irrigation and human consumption. Agriculture represents one-fourth of the country’s economy.

Residents across Pakistan and India rushed to stockpile foods and other essential supplies, while families living near the border fled to safer areas, as armed clashes between the nuclear-armed nations escalated on Friday.