Boiling is not the maximum temperature a substance can reach. The maximum temperature a substance can reach is called its boiling point. When a liquid reaches its boiling point, it turns into a gas. However, there are some substances that can reach temperatures higher than their boiling point without turning into a gas. These substances are called superheated liquids. Superheated liquids are created when a liquid is heated under pressure, which prevents the liquid from turning into a gas. When the pressure is released, the superheated liquid will flash into gas.