Heat Advisory
2026-09-01T21:00:00-05:00

* WHAT...Heat index values of 100 to 110 expected. * WHERE...Portions of central, east central, north central, and northeast Illinois and northwest Indiana. * WHEN...For the first Heat Advisory, until 9 PM CDT /10 PM EDT/ this evening. For the second Heat Advisory, from noon CDT /1 PM EDT/ to 9 PM CDT /10 PM EDT/ Wednesday. * IMPACTS...Hot temperatures and high humidity may cause heat illnesses.

Iroquois River At Rensselaer, Ind. Realtime Data


       

Seasonal Comparison


Oceanic Nino Index