The GRCA forecasts floods and issues flood warnings to municipal flood co-ordinators. The co-ordinators then implement their own local flood response plan and assist local residents. GRCA officials work closely with municipal flood co-ordinators, police, emergency management officials and others to operate, test and improve the flood warning system.
Flood messages are sent to radio stations, televisions stations and newspapers in the Grand River watershed and surrounding regions. Media outlets usually post these messages on their websites.