During the smoldering hot days of summer, people miss the cool breeze of winter. Both intense cold and heat are unbearable, but warm and wet winters also lead to problems. For example, northwest Russia experienced the warmest and wettest 2019/20 winter on record since 1902. Because of this, the permafrost melted, raising the risk of floods and landslides in the following spring, as well as rapid melting of snow and ice, which reduced available water resources and increased the risk of droughts in summer. What is the cause of this abnormal winter climate that increases the likelihood of sequential natural disasters?