Not only was the air quality worse because of smoky air blowing in from the "Panther Fire" in Tehama County...but it was pretty warm on Saturday.  

"The heat affects your hydration level and your electrolytes in your body which affects the way your organs function."

Noel Hastings is an Emergency Department physician with Sutter Medical Center in Sacramento. Doctor Hastings says breathing is harder when you're running in hot weather.   

"We do get a higher level, not only pollens just naturally this time of year, so particulates in the air, smokes tend to be kept closer to the ground. So we're inhaling a lot more stuff. So especially people with asthma, sometimes it's induced by exercise, definitely becomes more of an issue this time of year. I'm seeing a lot of people come in for asthma exacerbations."  

He says if you are going to run outdoors when the weather is hot….try to do it earlier in the day when the temperatures are cooler and drink plenty of water.