Multiple climate records were broken in 2016, according to a report published by the World Meteorological Organization this morning. Hearing about record high global temperature, exceptionally low sea ice, and persistent sea level rise was admittedly not the best start for celebrating the fifth International Day of Forests. Yet we need to be reminded about the vital and fragile links between atmospheric processes and forest functioning. As climate change rages on, we can expect hydrological cycles to become increasingly imbalanced around the globe. Especially tropical rainforests will consequently suffer. On the more hopeful side, scientists have now discovered that maintaining as high as possible forest complexity in tropical rainforests could buffer the negative impacts of climate change.