What’s that smell coming from the basement?

Not the future any more.

All drainage systems have their limitations and New York City’s is 1.75 inches of rainfall per hour. Unfortunately for many New Yorkers, the storm that deluged the region on Friday dropped more than two inches between 8 a.m. and 9 a.m. — and then kept on coming.

The limit on the capacity of the city’s network of drains, pipes and water-treatment plants is the main reason New Yorkers across all five boroughs suffered through flooding. And this probably will not be the city’s last bout with heavy flooding as it plays catch-up with the pace of climate change, experts said.

“This changing weather pattern is the result of climate change, and the sad reality is our climate is changing faster than our infrastructure can respond,” said Rohit Aggarwala, commissioner of the New York City Department of Environmental Protection.

And we still refuse to do anything about it, so expect more floods and droughts and lethal heatwaves.

The rush-hour downpour on Friday overwhelmed the 7,400 miles of pipes that carry storm water and sewage under the city’s hard surfaces to treatment plants or into the nearest rivers and bays. The runoff backed up into the streets, causing flooding that swamped cars and seeped into basements and subway stations in Brooklyn and Queens.

Note the sewage part. This is sewage that’s seeping into basements.

About 60 percent of New York City has a drainage system that combines storm runoff with sewage in the same pipes. When the flow through those pipes is more than double what the sewage treatment plants were designed to handle, the excess — a mix of rain and untreated sewage — goes straight into local waterways like the Gowanus Canal in Brooklyn, the East River or Jamaica Bay.

But as the sewer system backs up, some of that untreated wastewater winds up in the basements of homes and businesses around the city.

So that’s always nice.

Maybe we should all take up residence on cruise ships?

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