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

Dangerous torrential rainfall and flash flooding are underway in the mid-Atlantic and Northeast Thursday with millions at risk along the Interstate 95 corridor. It’s shaping up to be another serious flood event in a summer that’s been full of them.

A warmer atmosphere can hold more moisture, making storms capable of unleashing huge amounts of rain over land. Studies have shown that for every degree Fahrenheit that the planet heats up, the atmosphere can hold around 3% to 4% more moisture. As a result, flooding risks across the country are expected to increase in the coming years.

Water poured down into metro stations and shot up from the roads like geysers as the Northeast saw major flooding on Thursday.