In the 2014 and 2015 seasons, tragedies killed more than a dozen people. There were few summits from the south in 2014 and none in 2015. On April 18, 2014, 16 Sherpas were killed in an avalanche in the Khumbu Ice Fall. On April 25, 2015, 19 people were killed in an avalanche at base camp following a 7.8 earthquake, which killed more than 9,000 people and injured more than 23,000 in Nepal. It is the worst single-day fatality count in Everest's history. In 2019, 11 people died on Everest during a record season with huge number of climbers. Videos shared on social media showcased climbers waiting in long queues to advance up the mountain. The climbing season was closed in March 2020, due to the COVID-19 pandemic and potential outbreaks at base camp.