NEW YORK — A 62-year-old woman died after a fast-moving fire tore through a six-story apartment building in Harlem on Sunday afternoon, authorities said.

New York Police Department and Fire Department of New York (FDNY) units were dispatched to the building on West 140th Street, between Adam Clayton Powell Jr. Boulevard and Frederick Douglass Boulevard, shortly after 4:30 p.m. following reports of heavy smoke and flames. Within minutes, the narrow residential block was transformed into a scene of chaos as more than 80 firefighters and EMS personnel swarmed the area.

The unidentified victim was pronounced dead at the scene by emergency medical personnel, the NYPD confirmed. No other injuries were reported.

Witnesses described the fire as intense and terrifying. Nyla Redding, 28, who lives nearby, told The New York Post she watched thick, black smoke billowing from the windows. “The smoke was really dark, really heavy coming out the window,” she said. “When you see that many firetrucks, you know you’ve got a serious fire on your hands. It’s just a terrible tragedy that there had to be a victim.”

The blaze was classified as a one-alarm fire. Firefighters brought it under control more than an hour after arriving, PIX 11 reported.

Another resident, Anthony March, 40, stood on the street watching the drama unfold. “It looked really bad for a minute there,” he recalled. “But I didn’t find out until later that someone had died. I feel terrible for her, terrible for her family. One minute you’re enjoying a beautiful Sunday, the next you’re gone. And such a terrible way to go.”

In a haunting detail that quickly circulated among onlookers, a charred teddy bear was spotted lying on the roof of an SUV parked directly in front of the burning building — a silent symbol of the sudden loss of life in what had been an ordinary Sunday afternoon in one of Harlem’s vibrant residential neighborhoods.

The cause of the fire remains under active investigation by the FDNY Fire Marshals’ office. Officials have not yet released the victim’s identity or determined the exact origin and cause of the blaze. The FDNY did not immediately respond to The Post’s request for comment.

The incident marks yet another reminder of the lethal speed with which apartment fires can spread in older New York City buildings, even on a clear, sunny day. As the investigation continues, neighbors on West 140th Street are left mourning a woman whose life ended in the very place she called home.