Hastings is a city in and the county seat of Adams County, Nebraska, United States. It is the principal city of the Hastings, Nebraska Micropolitan Statistical Area, which consists of Adams and Clay counties. The population was 24,064 at the 2000 census. It is known as the town where Kool-Aid was invented by Edwin Perkins in 1927, and celebrates that event with Kool-Aid Days the second weekend of every August. Hastings is also known for Fisher Fountain, and during World War II operated the largest Naval Ammunition Depot in the United States. A National Weather Service Forecast Office is located there, serving central and south-central Nebraska and six counties in north-central Kansas. On June 24, 2007, Hastings won Yahoo's Greenest City in America competition.