Natural disasters are increasing at an alarming rate, much to people's concern. The catastrophic floods that killed at least 72 people in Spain were caused by a destructive weather system in which cold and warm air meet to produce heavy rain clouds, a pattern that risks becoming more frequent as climate change continues. The phenomenon is known locally as "DANA," a Spanish acronym for isolated high-altitude depression (depresion aislada en niveles altos). Unlike regular storms or gales, it can