This from Niko Stefani:

Lake Forest Fire Department Code 4 for the chimney fire.

Lake Forest Fire Department received a 911 call from a passerby reporting flames from a chimney at 472 E Illinois Rd. Battalion 42 arrived on the scene and reported flames shooting from the chimney and shortly after upgraded to a Code 4. Code 3 Response: Lake Forest Squad Co. 421 Engine Co. 422 Ambulance 421 and Battalion 42. The Code 4 upgrade brought Lake Forest Chief 4200, 4201, and 4202, Knollwood Ladder Co. 44, Lincolnshire-Riverwoods Squad Co. 51, Highland Park Engine Co. 34, Battalion 33, and Chief 3301, Deerfield Chief 2000, and Libertyville Ambulance 463. Change of quarters by Lake Bluff Chief 4503 and Wheeling Ambulance 24.
Knollwood Ladder 44 backed into the driveway and used their truck to gain a better view of the chimney from above. Lake Forest Squad 421 was originally in the driveway with their light tower set up.
Lake Forest Fire Department squad

Niko Stefani photo

aerial ladder raised on fire truck

Niko Stefani photo

Knollwood Fire Department fire truck

Niko Stefani photo