State officials from across the Colorado River Basin seized on a single message as they gathered here to discuss the future of the struggling waterway last week: The river is in a state of emergency that will very soon reach a crisis for the 40 million people who rely on it, affecting agriculture and municipalities alike. But faced with doomsday projections from the Bureau of Reclamation about major reservoirs, officials agreed that harmony has not yet extended to how best to address the shortfalls triggered by more than two decades of drought, which have dramatically constricted both the river’s flows and water storage.