Cold fire (Nyungar: karla nyidiny) is a type of controlled burn frequently used in the Noongar Aboriginal culture of Western Australia to clear undergrowth and promote easier access and movement through the country.

The cold fire is of low intensity and does not damage the middle or upper layers of the bush. Allowing movement through the bush and access to sacred sites is vital for Noongar culture. The cold fire also promotes a diversity of new growth, especially plant types that have a high food value, which in turn attracts animals to these areas. Additionally the cold fire is used to maintain large tracts of grazing habitat which need to be coordinated in a mosaic pattern every two years.