Not only is Lake Powell's water level plummeting because of drought, its total capacity is shrinking, too / Experts urge urgent water conservation as drought fears grow / Colombia's capital ends drought-related water rationing. Its case is a warning to other cities / Auckland on drought alert: Low dam levels prompt Watercare plans, water saving pleas / Two-way water transfers can ensure reliability and save money during drought in Western US / NYC issues first drought warning in 22 years, pauses aqueduct repairs to bring in more water / NYC issues drought warning and pauses aqueduct repairs / Tenerife in drought emergency crisis as tourists face paying more than locals for water / 'Vampiric' water companies fail to ensure supply during drought amid huge pipe leaks