Mayor-elect Zohran Mamdani faces rising seas, deadly heat, and billions in climate adaptation costs.

Zohran Mamdani’s victory as New York City’s next mayor marks a turning point — and a test. He’s inheriting a city already grappling with flooding subways, intensifying heat waves, and a multibillion-dollar climate adaptation bill. From reinforcing sea walls to expanding public transit and cutting emissions from buildings, the choices he makes in his first months could define his legacy. Environmental advocates say Mamdani’s progressive record positions him to lead boldly, but the scale of New York’s climate challenges may prove larger — and more urgent — than any mayor has faced before.








