Aging drainage collectors in Guadalajara threaten to trigger new sinkholes, floods, and road collapses. Experts call for a preventive water management plan. A recent study by Dr. Arturo Gleason Espíndola of the University of Guadalajara warns that at least 19 sites in the Guadalajara Metropolitan Area face imminent sinkhole formation. His analysis maps sections of the city’s collector network—built between 1902 and 1977—that have long outlived th…