Geo-Extreme 2021 aims to create a multi-disciplinary forum to discuss how the geo-engineering community can work with other professionals, e.g., climate scientists, engineers, emergency managers, resilience and sustainability investigators, insurance experts, and policy makers, to properly cope with extreme events (such as hurricanes, floods, extreme precipitations, droughts, wildfires, debris flows, earthquakes, tsunamis, landslides) under a changing climate.