Baseball Alberta states when air quality AQHI 7 or higher means that play should be stopped immediately.

Air Quality Health Index - Click Here

Please be sure to use best judgement and advise any players or coaches with any type of breathing conditions. Be aware of the common symptoms of irritated eyes, coughing and difficulty breathing.

Please refer Air Quality section in the following link.

http://www.baseballalberta.com/content/baseball-alberta-weather-policy