"Reflecting on the 20th anniversary of the massive North America blackout: Lessons learned and lingering concerns"

Twenty years ago, a massive blackout hit Metro Detroit and the Northeast, leaving 50 million people without power. The outage was sparked by a tree branch in Ohio and affected seven other states and Canada. The blackout caused chaos, immobilizing New York City and disrupting transportation and communication systems. It took about a day to restore power for most, but the lasting effects and damages cost hundreds of millions of dollars.