The water balance of Lake Balaton clearly shows why the water level is decreasing.

The water level of Lake Balaton is nearing historical lows due to a series of negative water balance years. Climate change has increased evaporation demands, making it difficult for winter water surplus to compensate for summer shortages. Research indicates that the lake's water supply area has undergone significant changes, with a shift in seasonal water balance. While winter surplus has slightly increased, summer deficits have intensified, leading to an overall negative balance. The situation is exacerbated by dry winters, which hinder water replenishment. Without substantial winter rainfall, the lake's water levels are at risk of further decline.