Analysis of the changes in specific (HBD acidity and HBA basicity) and general nonspecific (polarizability and dipolarity) solvent interactions in liquid water, as determined by means of solvatochromic probes, shows that this liquid undergoes an internal structural change with increasing temperature, connected with a small increase of its polarizability and basicity as well as a comparatively larger decrease of its dipolarity. This change in the structure of water shows up in a non-uniform change in the behavior of these solvent parameters in going to temperatures higher than 43 °C. Liquid water simultaneously decreases its acidity with the rise of temperature.