Antarctica encountered its first recorded heat wave in 2020. Record high temperatures occurred in East Antarctica , with a maximum  temperature ~7° above the mean maximum, and minimum temperatures > 0°. Record high temperatures  were also recorded in West Antarctica . It is too soon to know the impact on polar life, but such abrupt heating is expected to have wide-ranging effects on biota, from flash-flooding and dislodgement of plants, to excess meltwater supplying moisture to arid polar ecosystems . Heat waves in Siberia in 2016, 2018 and 2020, with air temperature anomalies >6°, were associated with extensive wildfires, pest infestations and melting permafrost .
IPCC
Climate Change 2022: Impacts, Adaptation and Vulnerability
IPCC Report