A Chicago flash flood warning went out Tuesday night as the city experienced some of its heaviest rain since 2023. More than 4 inches fell in less than 90 minutes on the West Side.

A "considerable" flash flood warning has been issued in Boston as heavy, life-threatening rain pounds the city and areas to the south. Two to 4 inches of rain has fallen so far. Rainfall rates are reaching up to 2 inches per hour.

Thursday will be a “storm sandwich” with pockets of heavy rain in the morning, a dry midday, and scattered afternoon showers and thunderstorms popping up across the region.