August 11, 2026 During heavy rain events, the Metropolitan Water Reclamation District urges people to hold off on use of dishwashers and washing machines in order to free up room in the region’s combined wastewater and stormwater pipes. As of Tuesday morning, MWRD’s McCook reservoir and tunnel system — serving central Chicago and 36 municipalities — was at 95% capacity, holding nearly 5 billion gallons of water. The larger Thornton reservoir and tunnels was holding a similar amount of water but
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