A Flash Flood Warning means rapid-onset flooding is imminent or may already be occurring. Persons along creeks, drainage ditches, and other waterways should take immediate precautions to protect life and property. During flooding, rapidly-moving water in drainage ditches, culverts, and detention ponds are especially unsafe and banks may quickly erode. Stay away or be swept away.

The National Weather Service in Chicago has issued a * Flash Flood Warning for... An Ice Jam Break in... East Central Grundy County in northeastern Illinois... Southwestern Will County in northeastern Illinois... * Until 915 AM CST Saturday. * At 815 PM CST, emergency management and river gauge data indicate the large ice jam near the I-55 bridge on the Kankakee River has broken. Locations immediately downstream of the I-55 bridge may see a rapid 3 to 5 ft rise in river levels up to the confluence with the Illinois River. HAZARD...Life threatening flash flooding from an ice jam. SOURCE...Emergency management. IMPACT...Life-threatening flash flooding of areas near the ice jam. After ice jam break up, the flood wave will move down the Kankakee River from Wilmington to Phelan Acres. FLASH FLOOD...OBSERVED FLASH FLOOD DAMAGE THREAT...CONSIDERABLE