August 5, 2022 | Published by |

A spatially compounding event occurs when several impacts occur at the same time but at different locations. An example is the high-impact weather events in the Northern Hemisphere in June and July 2021, which included an extreme heatwave in North America and heavy rainfall leading to flooding in Europe and China. These events were caused by a common atmospheric mechanism: undulations in the jet stream, a band of strong winds in the upper atmosphere. Another example is the Australian Black Summer of 2020/21, when numerous bushfires occurred in many different regions within the same emergency services jurisdiction. This led to nationwide losses exceeding A$10 billion.