Overnight rain flooded a portion of the Bronx River Parkway, causing a major shutdown for several hours. 

Crews pumped hundreds of gallons of water from both sides of the roadway near the Westchester Avenue exit. 

A worker with the Department of Environmental Protection says the flooding started because the pavement was milled as part of ongoing repair work, which caused debris to clog a catch basin at the location. 

All lanes have since reopened.