Complex sentence: Fire temperatures in a building can reach 1100 ° C, depending on the fuel present and the availability of oxygen, but the hydrates keep the temperature of the item at or below 100 ° C until all the water is spent.
Split into simpler sentences: Fire temperatures in a building can reach 1100 ° C, depending on the fuel present and the availability of oxygen. The presence of hydrates keep the item exposed to the heat at or below 100 ° C, until all the water is spent.