Drought is an ancient natural hazard that has probably killed more people than any other. It is difficult to mark the start and end of drought because the moisture deficit develops slowly over weeks, months, or years. Atmospheric scientists can neither forecast nor control drought. Drought mitigation must focus on reducing the underlying physical and social vulnerability. Short-term adjustments do not yield a lasting adaptation to drought. Some argue that repetitive food aid may worsen long-term food-production problems and land degradation by deferring more fundamental adjustments. Decisionmakers need better information and a broader range of adjustment options in order to reduce drought vulnerability. A linking of global warming/climate change studies with drought studies can yield insights into how societies might deal with climate change and help define the potential for future drought. (Ed.)