NYC's tested out small fillable dams to try and stop flooding of basements in NYC during heavy storms. They're going to be giving out free dams and sandbags to homes based on flooding risk models. Those not eligible will need to buy them for themselves. Floodworx Water Barrier
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Some tidbits:
“New Yorkers are going to need to develop a culture of preparedness,” Aggarwala said, standing outside Mrvica’s home. “It doesn't mean the city is going to shirk responsibility. We’re going to do everything we can.”
"It’s part of an effort to get New Yorkers to change their own sense of personal responsibility in response to climate change, Aggarwala said, noting that property owners along the coast in the southeastern U.S. are told to keep a stockpile of food, water and medicine in case of severe storms."
"The emphasis on homeowner responsibility comes after statements by Mayor Eric Adams describing the city’s role in storm preparedness as largely one of communicating risk, evacuation routes and possible preventive measures for flooding. "
ie. you better prepare because we're not going to be there for you.