Danielle O'Hanley, from Toronto, runs early in the morning to avoid the heat.
"I saw it was going to be 30 or 35 degrees after work, so I was up early and out running by 7 a.m. so that I could have … [+5178 chars]
From weekend runners to Olympians, people are changing when, where and even whether they run as heat, wildfire smoke and smog make certain types of exercise dangerous.
