They have to descend downwards as soon as possible in case of such an Avalanche.
Masses of snow, ice, and rocks can fall rapidly on Everest anytime. Falling any of these articles in a larger quantity can be a risk for the climbers. They have to descend downwards as soon as possible in case of such an Avalanche. So, it is one of the major difficulties in the Everest Expeditions. There is some particular area on Everest where the occurrence of Avalanche is high. The places such as North Col, South Col, and Khumbu Icefall have higher chances of an avalanche. You cannot completely control the flow but you can be cautious and try to cross these areas early in the morning before the sun melts the snow.