Chicago Weather: Building Storm Threat For Wednesday

CHICAGO (CBS) -- Heat and humidity increase Wednesday ahead of the next disturbance.

The highest storm chance is after 4 p.m. through sunset. The greatest hazard is heavy rain and localized flooding.

The Storm Prediction Center has the Chicago area in a "marginal" (level 1 out of 5) risk for severe weather. Localized flooding and damaging winds are the biggest concern.

The high for Wednesday is 88.

After that system departs, heat builds into the weekend with highs in the mid-90s and a feels-like temp in the triple digits.