• Severe storms, including possible tornadoes, disrupted Ameren Illinois service territory on June 17; Galesburg, Decatur, Mattoon, Charleston among hardest-hit areas.
• About 25,000 customers remained without power at the time of the report; 63,000 outages restored since the prior morning.
• Damage included more than 380 downed distribution or sub-transmission poles, a key constraint on restoration timelines.
• Restoration crews were scheduled to work into June 19; latest estimated restoration targets ran as late as 11 p.m. June 19.

Disclaimer: This news brief was created by Public Technologies (PUBT) using generative artificial intelligence. While PUBT strives to provide accurate and timely information, this AI-generated content is for informational purposes only and should not be interpreted as financial, investment, or legal advice. Ameren Illinois Co. published the original content used to generate this news brief on June 18, 2026, and is solely responsible for the information contained therein.