Complex sentence: There were 10 tornadoes, the worst of which touched down in The Acreage and downed power lines and trees, causing significant roof damage to several houses; there was also one injury.
Split into simpler sentences: There were 10 tornadoes, the worst of which touched down in The Acreage. The twister downed power lines and trees, causing significant roof damage to several houses; there was also one injury.