What was the worst blackout in the United States when did it occur?
On November 9, 1965, the Northeast Blackout left more than 30 million people without power for 13 hours, affecting most of the Northeastern U.S., including Connecticut, Massachusetts, New Hampshire, New Jersey, New York, Rhode Island, Pennsylvania, and Vermont. The cause of the blackout was said to be human error.
What was the longest NYC blackout?
NYCdata | Disasters. The Queens blackout of 2006 was one of the longest blackouts to hit the New York City (NYC) region. It began on July 17th and continued for eight days until power was restored on July 25th.

What caused the 2011 Southwest blackout?
Due to a mistake by a technician, a 500 kV line between Arizona Public Service’s Hassayampa substation near the Palo Verde Nuclear Generating Station in Tonopah, Arizona and the North Gila substation in Yuma, Arizona was accidentally shut down. This transmission line is part of the Southwest Power Link.
When was the famous blackout in New York?
The New York City blackout of 1977 was an electricity blackout that affected most of New York City on July 13–14, 1977.
What caused the blackout in 2003?
On August 14, 2003, a series of faults caused by tree branches touching power lines in Ohio, which were then complicated by human error, software issues, and equipment failures, led to the most widespread blackout in North American history.

Why does California have so many rolling blackouts?
Those rolling blackouts, the first in two decades, have been largely blamed on factors like climate change-induced heat waves and the state’s large-scale transition to renewable energy generation.
What caused NYC blackout?
The power failure occurred on the 42nd anniversary of the New York City blackout of 1977, which left nine million customers without power….Manhattan blackout of July 2019.
Location of Manhattan within New York City | |
---|---|
Date | July 13, 2019 |
Location | Manhattan, New York |
Type | Blackout |
Cause | Electric generator fire or transformer fire |