NewsLocal health unit lifts heat alert for Peterborough SHARE ON: Amanda Lorbetski, staff Friday, Jul. 31st, 2015The heat alert has been lifted in Peterborough.The Peterborough County-City Health Unit says this is because of cooler temperatures and less humidity. The heat alert started on Monday.But the health unit is still urging the public to stay safe in hot weather. Drink water to stay hydrated. Maintain a cool temperature in your home and avoid the heat outdoors when possible.For more information, click here.