During Mayor Mamdani’s tenure, New York City is certain to experience another record-breaking rainfall event. In just the past few months, there have been storms that left more than 100 commuters stranded in Bayside, dumped 3 feet of floodwater into a children arts studio in Clinton Hill, and devastatingly drowned our neighbors in Flatbush and Washington Heights. The question isn’t if it will happen again, but how prepared we’ll be when it does.

Mamdani has already correctly characterized a central challenge: “the infrastructure of the city has shown itself unable to keep up with rainfall that dwarfs the amount that our sewage system was built for more than 100 years ago,” he said after the record-breaking flooding on Oct. 30.

Climate resilience is inseparable from the affordability platform that propelled Mamdani to victory. Flooding is New York City’s most frequent........

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