WATCH: New York City Subways Experience Crazy Flooding

Commuting in New York City wasn't a lot of fun Monday—not that it's ever really a barrel of laughs—when a number of subway stations flooded amid a downpour.

A veritable alphabet of train lines, including the B, D, E, F, G and M experienced delays Monday morning, according to the New York Daily News. The paper reported that signal issues at a major hub—34th Street Herald Square—around 9:45 a.m. caused issues that persisted later into the morning.

New York City was issued a flash flood warning on Monday. According to the National Weather Service, some 2 inches had fallen Monday before noon. It was hard to avoid the torrential rain, even underground.

A video posted on Twitter by a user named @JBGuild showed a water gushing down steps at 145 Street and Broadway, the scene looking and sounding like a mini waterfall. Another post from @DangBattleShip showed a shower of rain over subway cars at the Bryant Park station, while a video from @BretHyde showed the same.

scenes from 145th st/broadway. @NYCTSubway @MTA @NY1 #justalittlerain

— josh guild (@jbguild) April 16, 2018

.@NYGovCuomo Fix the subways. cc: @2AvSagas @CynthiaNixon

— Bret Hyde (@BretHyde) April 16, 2018

The Twitter account for the New York City subway system posted a message that it had resolved the issues at the 145th Street and Broadway station. "Thank you to our crews who are clearing a considerable amount of water that entered the system from the street this morning and are helping to keep New Yorkers moving."

Even when it's not pouring rain (above and underground), the subways are a source of frustration for many New Yorkers amid declining performance and frequent delays. A New York Times investigation in November found just 65 percent of weekday trains arrived on time, the worst performance of any rapid transit system in a major city.

It has become such a source of anger for New Yorkers that Cynthia Nixon—the actress and activist who is challenging Governor Andrew Cuomo in the Democratic primary—has made fixing the subways one of her key campaign issues.