The superstorm left at least 46 people dead across five states, including 25 in the Garden State and at least 13 in the Big Apple
The record-breaking rainfall caused widespread flooding and damage in multiple communities on both sides of the Hudson River.
Before-and-after photos capture a waterlogged Bethesda Fountain in Central Park, the Major Deegan Expressway turned into a river, and various shocking scenes from Jersey, including Somerville, Manville, South Bound Brook and New Brunswick — showing the towns submerged in muddy water.
Dozens of homes also were destroyed by tornadoes spawned by the storm in New Jersey.
At least 20 homes in Mullica Hill were leveled by one of the powerful twisters.
A majority of the victims in New Jersey were people who drowned after their vehicles were caught in flash floods, some dying in their submerged cars and others getting swept away after exiting into fast-moving water.
In New York, a 2-year-old boy and his parents drowned in a basement apartment in Queens when the rapidly rising floodwaters trapped them.
The hurricane also knocked out power and brought the subway system to a standstill — and prompted the first-ever flash flood emergency for the Big Apple as it left a trail of devastation up the North East from Maryland to New York.