This publication provides an overview on the extensive research on the performance of concrete in fire that has provided an excellent understanding of the behaviour of concrete structures in a fire. Concrete, when appropriately designed, is inherently fireproof due to its non-flammability and thermal insulation properties. This understanding enables designers to move from existing prescribed tabulated values for fire resistance to computer simulation and performance-based fire engineering. While prescriptive data will continue to have a role to play, new standards such as Eurocode 2 will incorporate greater degrees of flexibility to the sizing of concrete elements for fire safety. This means designers will have more scope for efficient design of concrete structures.