The boiling point of water is influenced by altitude and atmospheric pressure. At sea level, or one standard atmospheric pressure (0.1MPa), water boils at 100°C. However, as altitude and atmospheric pressure change, the boiling point also changes. Therefore, 100°C is a theoretical concept for boiling water. In most regions, water at 95°C is already effectively boiling and safe for drinking.
Note:
Setting the temperature to 100°C can cause the water to splash, which will pose a safety risk.