The name of the Rea derives from a root found in many Indo-European languages and means "to run" or "to flow".

A pair of decorative arches on the bridge where Gooch Street crosses the river mark the first settlement of Birmingham.

There are proposals to include a riverside walk and new bridge over the Rea at Digbeth's Custard Factory media and arts complex (now complete).

Near Gravelly Hill Interchange, about 14 miles (23 kilometres) from its source, the Rea merges with the River Tame, with its waters eventually reaching the North Sea via the Trent and the Humber Estuary.

A £2.7 million scheme to reduce the risk of flooding to more than 200 homes and businesses in the south of Selly Park was completed in January 2018.