This story by the Washington Post discusses how excessive water use combined with less precipitation due to global warming is leading to alarmingly low water levels in the Colorado River Watershed.
The tension between the United States and Mexico over water allocations is rising as a drought ridden United States is behind 38% in giving Mexico its due water allotment.
The prolonged drought has led to conflict as farmers may have to face water cuts, and there is argument over which states and which farmers will have to have the cuts.