On 26 April 1986, the explosion and subsequent open-air graphite fire at Reactor No. 4 of the Chernobyl Nuclear Power Plant contaminated the soil, water and atmosphere alike with radioactive material. The 30-km2 Chernobyl Exclusion Zone remains one of the most contaminated areas in the world today. Over a thousand wildfires have burnt inside the zone since it was established, raising international concern that combustion from a high-intensity wildfire will reanimate radioisotopes currently held in the vegetation and soil. This presentation focuses on the wildfires that blazed in the Chernobyl Exclusion Zone in the spring of 2020, to examine the lingering health effects, political manoeuvring, and insurance implications of the Chernobyl nuclear disaster. The affective atmospheres of these wildfires require attention in order to understand the impacts of unnatural disasters. To think through the consequences of events that are not bound by two-dimensional cartographies, and that transcend geopolitical borders in space and time, we bring ideas regarding affective atmospheres and volumetric/voluminous sovereignty from cultural geography and cognate disciplines into conversation with insurance studies.