Photo: Alexi J. Rosenfeld / Getty Images News / Getty Images The annual National Independence Day Parade in Washington, D.C., scheduled for Saturday (July 4), was canceled late Friday due to extreme heat, with organizers citing safety concerns for participants and spectators as their top priority. The parade, which typically draws thousands to Independence Avenue, was called off after weather forecasts predicted dangerous triple-digit temperatures and heat indexes well above 100 degrees.