Flooding caused delays on multiple New York City subway lines Monday as torrential rain pummeled the Tri-State Area.

The subway system, which is more than a century old, is relied on by millions of passengers every day and weaves the city into a cohesive network.

The flooding necessitated rescues, grounded planes, and submerged vehicles in waist-high water less than two weeks after flash floods in Texas killed more than 100 people, triggering concerns about the increasing number of flood fatalities in recent years because of heavier rainfall,