Tree mortality: tree mortality that exceeds natural levels degrades habitat for plant and animal species, increases carbon emissions and reduces water supplies for people. Anthropogenic climate change caused three cases of drought-induced tree mortality in the period 1945-2007 in western North America, the African Sahel and north Africa in temperate and tropical ecosystems. Increased pest infestations and wildfires due to climate change also caused much of the recent tree mortality in North America. These changes occurred at GMST increases of 0.3°C-0.9°℃ above those in the pre-industrial period. Models project increasingly extensive drought-induced tree mortality at continued temperature increases of 1℃-2°℃. Models project risks of mortality of up to half the forest area in different biomes at temperature increases of 2.5°C-4.5℃. In Amazon rainforests, insufficient plant moisture reserves during drought increase the risk of tree mortality, and, combined with increased fire from climate change and deforestation, the risk of a tipping point of massive forest dieback and a biome shift to grassland. 
IPCC
Climate Change 2022: Impacts, Adaptation and Vulnerability
IPCC Report