Weather Alerts For Merrillville, IN

# HEADLINE -------------------- FLOOD ADVISORY IN EFFECT UNTIL 11 AM CDT THIS MORNING REPLACES FLOOD WARNING # DETAILS -------------------- WHAT Flooding caused by repeated rounds of thunderstorms continues. WHERE Portions of Illinois, including the following counties, Cook, De Kalb, Kane, Kendall, La Salle and Will and northwest Indiana, including the following counties, Lake IN and Porter. WHEN Until 1100 AM CDT. IMPACTS High water in retention ponds, ditches, rivers, creeks, and streams, and low-lying areas will continue to subside through the morning. ADDITIONAL DETAILS - At 823 AM CDT, gauge reports along area rivers, creeks, and streams indicate residual high water from repeated rounds of thunderstorms. - SOME LOCATIONS THAT WILL EXPERIENCE FLOODING INCLUDE - Chicago, Aurora, Joliet, Naperville, Hammond, Gary, Bolingbrook, Orland Park, Tinley Park, Oak Lawn, Romeoville, Plainfield, Calumet City, Portage, Merrillville, Valparaiso, Oswego, Chicago Heights, Chicago Lawn and Roseland. - http://www.weather.gov/safety/flood ISSUED AT Sunday, July 5, 2026 at 8:24 AM CDT ISSUED BY National Weather Service Chicago IL HEADER Flood Advisory # PRECAUTIONARY/PREPAREDNESS ACTIONS -------------------- A Flood Advisory means minor flooding along waterways and other poor drainage areas is imminent or may already be occurring. Persons in the advisory area should use caution and avoid flood waters. # AREAS AFFECTED -------------------- Cook IL, De Kalb IL, Kane IL, Kendall IL, La Salle IL, Lake IN IN, Porter IN, Will IL