Hartford, Connecticut/Minneapolis: Authorities are searching through rubble and debris in southern Michigan after suspected tornadoes tore through the region and killed four people, including a 12-year-old boy, during powerful storms also blamed for two deaths in eastern Oklahoma. First responders from agencies in the Union Lake area near Union City were looking for more possible victims and working to clear roads, authorities said. Photos and videos posted on social media showed flattened homes and downed trees in a lakeside neighbourhood. Severe thunderstorms that began in northern Indiana appeared to spawn multiple tornadoes in southern Michigan the previous day, said meteorologist Lonnie Fisher of the National Weather Service (NWS), which sent teams to the region to evaluate the damage and confirm tornadoes.…