The solvation of infinitely dilute aqueous Cl-, Br-, I-, Cs+, K+, M+, and the corresponding salts is analyzed by integral equation calculations along three near critical water isotherms according to the recently proposed molecular-based formalism which connects the solvent environment around individual ionic species with their macroscopic solvation behavior. Special emphasis is placed on the temperature dependence of some solvation-related macroscopic properties that are identified as potential candidates for the development of improved engineering correlations. Formal and integral equation calculations are then used to interpret recent experimental data, and some relevant theoretical implications regarding the modeling of high-temperature aqueous electrolyte solutions are discussed. (C) 2001 American Institute of Physics.