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This article evaluates the role of prolonged drought in the Terminal Classic Maya collapse (c. 800–1000 CE) by integrating high-resolution paleoclimatic proxy data with archaeological evidence of political fragmentation, warfare, and ecological degradation. Oxygen isotope records from the Yok Balum speleothem, gypsum deposition data from Lake Chichancanab, and titanium concentrations from the Cariaco Basin marine core converge to confirm that the ninth and tenth centuries witnessed the most severe and sustained droughts of the past two millennia in the circum-Caribbean region. The article critically examines Richardson Gill's monocausal drought thesis, acknowledging that his emphasis on climatic stress has been vindicated by subsequent paleoclimatic discoveries, while demonstrating that drought alone cannot account for the regional variability of the collapse. Cities in the northern Yucatán flourished during the same period that southern lowland polities were abandoned; coastal and riverine settlements persisted; and some southern cities declined before the worst drought episodes, while others survived into the tenth century. Drawing on Turner and Sabloff's critique of monocausal reasoning and Lucero's model linking water management to political legitimacy, the article argues that the Terminal Classic crisis was a compound event in which climatic stress interacted with the structural vulnerabilities of divine kingship, elite competition, deforestation, and soil degradation to produce regionally differentiated outcomes. Drought was a trigger, not a sufficient cause.