In this photograph from the Portland Evening Express on July 5, 1978, children play on the USS Maine cannon in Fort Allen Park while they wait for the evening’s Fourth of July fireworks display.

In this photograph from the Portland Evening Express on July 5, 1978, children play on the USS Maine cannon in Fort Allen Park while they wait for the evening’s Fourth of July fireworks display. Portland Public Library Special Collections & Archives

This photo, taken July 5, 2013, shows spectators on the Eastern Promenade after that year’s fireworks display was postponed one day because of rainy weather.

This photo, taken July 5, 2013, shows spectators on the Eastern Promenade after that year’s fireworks display was postponed one day because of rainy weather. Joel Page/Staff Photographer