The death toll from sudden and deadly floods in Nepal, China, and Tibet topped 900, with the total certain to rise considerably as rescuers try to reach those trapped by the disaster.

Nepal’s National Disaster Risk Reduction and Management Authority put the latest number of confirmed dead at 903. Some of the bodies were recovered 150 miles from ground zero of the flood, which swept away thousands on Wednesday. The government put the number of missing at 4,250, and rescuers are currently focusing on reaching 933 missing people who are believed to be trapped in the tunnels of six hydropower projects.