New York City and Boston are bracing for Category 5 Hurricane Lee to make landfall, but the East Coast is already experiencing severe thunderstorms set to last through the weekend. 

The region has sweltered under high temperatures and humidity in recent weeks, but both major metros are expected to be washed out Friday evening. 

The weather front has brought travel chaos to the skies as over 200 flights have already been cancelled out of JFK, Newark and LaGuardia airports, according to FlightAware. 

As the thunderstorms rolled in, residents took to social media to share images of ominous clouds filling the skies of New York in a sign of what is forecast to come. 

The storms have come following blistering temperatures across the eastern seaboard, where the mercury topped 90 degrees for three consecutive days for the first time all year in New York City on Friday. 

Summer in the Big Apple was grayer and cooler than usual, with the metropolis repeatedly blanketed by smoke and haze from Canadian wildfires. 

A heat advisory warning is still in effect in New York City and parts of New Jersey, as the torrential front barreling in resembles a tropical storm. 

Officials are bracing for damage as high winds, heavy rainfall and potential hail could cause flash flooding and structural damage in some areas.