As "catastrophic" flooding rolls through Houston and other parts of southeast Texas, both Mayor de Blasio and Governor Cuomo have deployed emergency personnel to aid in the ongoing response.

Early Sunday morning, the mayor announced that 120 members of the FDNY's Incident Management Team and the Urban Search and Rescue Rapid Response Team had been deployed to assist Texas authorities on the ground. "After Superstorm Sandy, so many cities stepped up to help our people," the mayor tweeted. "We'll do all we can to help those affected by this storm."

New York City is sending 120 emergency personnel to Texas to assist in the aftermath of Hurricane Harvey. — Bill de Blasio (@NYCMayor) August 27, 2017

As of 9 a.m., the rescue forces were set to stage to in San Antonio, according to the FDNY.

"We have a compilation of tools that include boats, motors, dry suits, rescue equipment for collapsed structures, rope equipment for confined spaces, and a large compilation of Haz-Mat equipment and tools," said FDNY Battalion Chief Jack Flatley. "We're also supplied with a large, self-sufficient cache of food and supplies that make us sustainable for up to 72 hours in a row. I believe we're ready to face any danger."

Additionally, Governor Cuomo announced in a press release on Saturday evening that he'd deployed rescue teams, maintenance and support staff, three rescue helicopters, one rescue plane and several boats from the 106th Rescue Wing of the New York Air National Guard. The personnel and resources arrived in Fort Hood yesterday.

"New Yorkers first-hand know the damage Mother Nature can cause, and we stand shoulder to shoulder with Louisiana and Texas as they brace for Hurricane Harvey," the governor said.

Both Mayor de Blasio and Governor Cuomo say they've been in contact with Houston Mayor Sylvester Turner and Texas Governor Greg Abbott, respectively.

The Houston Fire department reportedly estimates rescuing over 1,000 people overnight. Hundreds more are stranded throughout the state, and rescue operations remain underway as of Sunday morning.

Flooding is devastating, video taken by officers of patrol vehicles and personal cars floating at Central Parking lot #HurricaneHarvey pic.twitter.com/WQg6rAB2qQ — HPOU (@HPOUTX) August 27, 2017

This photo from Meyerland area, southwest Houston. Shared by a resident there. #houwx #harvey pic.twitter.com/qYu6bwe4DF — Dylan Baddour (@DylanBaddour) August 27, 2017