Flooding caused delays on multiple New York City subway lines Monday as torrential rain pummeled the Tri-State Area, where many were under flash flood warnings. MTA Chair and CEO Janno Lieber says riders can expect normal service for the morning commute Tuesday.

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.

Heavy rains and flash flooding in the northeast have caused two deaths in New Jersey. More rain is expected through mid-week for portions of the eastern and central U.S.