Wildfires that had receded in northern Manitoba have begun to roar back, forcing a wave of new evacuations and a major hub for people living in the north to declare a state of emergency. The province reported 81 active fires on Monday with 16 of those threatening communities, leaving some residents to leave their homes immediately, flee a second time or prepare to leave on a moment’s notice. Fire is threatening the northern city of Thompson and its 13,000 residents, resulting in officials declaring a local state of emergency effective until Aug. 6. The city said in a Facebook post that it’s a precautionary move to ensure leadership is prepared for changing conditions. “It gives the city the ability to take action, if necessary, to protect residents and property,” the…