Add Yahoo as a preferred source to see more of our stories on Google. At least four people were killed Friday in southern Michigan as powerful storms that produced at least one tornado reduced homes to rubble, sent parts of roofs flying into the air and left a trail of debris hanging from power lines.

Add Yahoo as a preferred source to see more of our stories on Google. Residents in parts of southwest Michigan are being urged to take cover as tornadoes are expected to rip through the area.