tl;dr: Extreme drought and heat across Central and Eastern Europe have devastated fish farms and freshwater ecosystems, with Hungary reporting 99% of its land under severe drought, 280 metric tons of dead fish, and $4.2M in losses. Farmers in Romania, Czech Republic, Bosnia, and Slovenia are resorting to emergency measures like draining ponds, adding liquid oxygen, and pumping in millions of liters of water to keep fish alive. Scientists link the crisis to human-induced climate change, and desertification now threatens much of the Great Hungarian Plain.