A damaging derecho is taking aim at Chicago with widespread wind gusts of 80 to 100 mph.

[frazzled]

8. We battened down the outside elements

on our roof deck. If they were to go flying, it could kill someone.

More here:

The storm system is paired with humid conditions and a heat index of more than 100 degrees in the Chicago area. Borchardt said the heat and humidity will contribute to the intensity of Monday’s storms.

“You can almost wear the air,” Borchardt said. “This kind of air is like rocket fuel to storms.”

The counties projected to have storms Monday include Winnebago, Boone, McHenry, Lake, Ogle, Lee, DeKalb, Kane, DuPage, LaSalle, Kendall, Grundy, Kankakee, Livingston, Iroquois, Ford, Cook and Will counties in Illinois.

https://www.chicagotribune.com/weather/ct-chicago-weather-monday-strong-storms-20200810-jl5iqp3zxjfxhonbnlwohr2avy-story.html