This from Larry Shapiro:
Arlington Heights firefighters responded to smoke in the building on Wednesday (11/4/20) at 2415 Kennicott DR. Units arrived and the alarm was upgraded to a Code 4. They had fire in one, second floor unit that was extinguished in short order. There was some significant smoke throughout. Buffalo Grove firefighters went to the roof and made several ventilation holes. In addition to all Arlington Heights companies, mutual aid units included Buffalo Grove Quint 25, Rolling Meadows Quint 82, and Prospect Heights Battalion 9.