In the United States, 40 million people in seven states depend on water provided by the Colorado River.After 20 years of drought, the situation is dire and the river is at risk of becoming a “deadpool,” a condition in which there is not enough water to pass through the dams.The states were supposed to come up with a deal to cut their usage by Tuesday. Now, the federal government may have to step in and make a difficult decision.Guest: Christopher Flavelle, a climate reporter for The New York Times.Background reading: The seven states that rely on the river for water are not expected to reach a deal on reductions. The federal government could impose cuts for the first time in the water supply for millions of Americans.For more information on today’s episode, visit nytimes.com/thedaily. Transcripts of each episode will be made available by the next workday.