South Texas and other drought-ravaged portions of the state are heading into the new year with dangerously low water supplies thanks to two consecutive summers of punishing heat, Inside Climate News reports. Large reservoirs on the Lower Rio Grande dropped from 33% to 23% of their capacity during the past 12 months, according to the nonprofit news site. Experts now warn another hot, dry year would drain those reservoirs to historic lows, prompting emergency interventions.