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Hurricane Ida triggers massive grid failure in Louisiana and Mississippi [free access]

September 1, 2021

On August 29, 2021, Hurricane Ida heavily damaged the transmission infrastructure that delivers electric power to large parts of Louisiana and Mississippi causing a massive grid failure. The major utility in the region—Entergy, reported that the hurricane led to major power outages in the city of New Orleans and impacted close to 1 million people across Louisiana and Mississippi.


The damage caused by the hurricane was of a catastrophic intensity, which resulted in a load imbalance that forced power plants to trip offline. It was reported that 220 substations and 210 transmission lines spanning and more than 2,000 miles (3,200 km) were out of service.


As of September 2, 2021, Entergy continued to make progress and restored power to over 167,000 customers. However, several thousands of homes and businesses are still without power and over 1,490 miles (about 2,400 km) of transmission lines remain out of service. It is expected that several people may have to stay without power for weeks. Entergy is reportedly working closely with critical-service providers to help eliminate any disruption to services as its crews restore power.