A $32 Million ‘War on Rats’ campaign isn’t working. New York City Mayor Bill de Blasio declared a ‘war on rats’ in July 2017, demanding “more rat corpses.”

However, our co-investigation with the New York Times found that rat sightings are up 38% between 2014 and 2018. In the first four months this year, rat sightings are again up versus the same period last year.

HERE IS THE NYTIMES COLUMN

Rats Are Taking Over New York City Gentrifying neighborhoods are a key reason behind the vermin outbreak, which extends beyond New York — Philadelphia, Chicago and Los Angeles are also confronting issues. By Winnie Hu

So many rats regularly lurk on a sidewalk in Brooklyn that it is the humans who avoid the rats, not the other way around. Not even cars are safe: Rats have chewed clean through engine wires.

A Manhattan avenue lined with trendy restaurants has become a destination for foodies — and rats who help themselves to their leftovers. Tenants at a public housing complex in the South Bronx worry about tripping over rats that routinely run over their feet.

New York has always been forced to coexist with the four-legged vermin, but the infestation has expanded exponentially in recent years, spreading to just about every corner of the city.

“I’m a former Marine so I’m not going to be squeamish, but this is bad,” said Pablo Herrera, a 58-year-old mechanic who has counted up to 30 rats while walking on his block in Prospect Heights, just around the corner from the stately Brooklyn Museum.

Rat sightings reported to the city’s 311 hotline have soared nearly 38 percent, to 17,353 last year from 12,617 in 2014, according to an analysis of city data by OpenTheBooks.com, a nonprofit watchdog group, and The New York Times. In the same period, the number of times that city health inspections found active signs of rats nearly doubled.

Mayor Bill de Blasio, like mayors before him, has declared war on rats, but so far the city is still losing.

“There is no doubt that rats have a major impact on New Yorkers’ quality of life and this administration takes seriously our responsibility to control and mitigate their population,” said Laura Anglin, deputy mayor of operations. “No New Yorker likes having rats in their community and we are committed to continuing the work of controlling rats in all of our neighborhoods.”

One key reason rats seem to be everywhere? Gentrification. The city’s construction boom is digging up burrows, forcing more rats out into the open, scientists and pest control experts say.Milder winters — the result of climate change — make it easier for rats to survive and reproduce. And New York’s growing population and thriving tourism has brought more trash for rats to feed on.

But the onslaught of rats extends beyond New York: Cities such as Philadelphia, Chicago and Los Angeles are also confronting outbreaks.

“Everywhere I go, rat populations are up,” said Robert Corrigan, a research scientist in New York who estimates that their numbers may have increased by as much as 15 to 25 percent in some cities.

The rodents are not only a nuisance and a blight on the quality of life, but also a health risk. A bacterial infection spread by rat urine, leptospirosis, killed a Bronx resident in 2017.

Chicago — crowned the nation’s rat capital in one study — has more than doubled its work crews dedicated to rats, who set out poison and fill in burrows in parks, alleys and backyards. It also passed ordinances requiring developers and contractors to have a rat-control plan before demolishing buildings or breaking ground on new projects.

Washington, where rat complaints have nearly tripled to roughly 6,000 last year from 2,400 in 2014, is testing a rat-sterilization program tried elsewhere that uses liquid contraceptives as bait.

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