Friday, temperatures are expected to reach the mid 80s with a 40 percent chance of heavy rain. Saturday, the chance of thunderstorms is 50 percent with highs in the upper 80s.

The flood watch is in effect until 7 a.m. Friday for Cook County, the collar counties and the majority of northern Illinois, according to the National Weather Service.

Texas. North Carolina. Illinois. New Mexico. Flash flooding has surged into the spotlight in the last week with record-breaking flood events occurring nearly back-to-back across the country. Here’s why they happened now and why floods are becoming more intense.

Chicago flash flooding caused sudden road washouts, and water rescues had to be made at more than one location on the West Side.

The quick-falling rain led some parts of Chicago and Cook County to get upwards of five inches of rain in less than three hours.

Follow for live updates in the Texas flooding as more than 160 are missing as rescuers continue a desperate search

Destructive flash floods hit New Mexico and Chicago on Tuesday, prompting water rescues. Here’s where they may hit next.

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.