Five days have passed since flash floods and debris flows swept through the border region of northern Nepal, and emergency responders are continuing search and rescue efforts, including for several hundred workers believed to be trapped in underground tunnels near hydropower projects in the area.

The death toll rose to 950 people on Monday, with more than 4,400 people missing. Access remains extremely limited, with 32 bridges destroyed and 25 miles of road destroyed. Many places are only reachable by helicopter, and monsoonal rains are threatening to cause further flooding.…