Firefighters arrived at the corner of Aero Drive and Kearny Villa Road and noticed a suspicious odor they believe could be related to the man's condition.
A hazmat crew was called to investigate but was unable to identify the odor.
Others in the area were also affected and were transported to the hospital. Hazmat investigators then visited the affected parties in an attempt to determine the scent's cause.
Check back for updates on this developing story.