Strong storms rolled over Metro New Orleans on Thursday afternoon, with outages reported among Entergy customers in Jefferson Parish while flash flood warnings covered the Southshore. The National Weather Service warning covered Jefferson Parish, New Orleans, and Plaquemines Parish, and was set to expire at 5 p.m. Thursday. Outages were reported in Jefferson Parish, even as pockets of trouble popped up elsewhere across the region.
WDSU and WWL-TV reported outages and storm conditions in Jefferson Parish. The brief but intense burst of severe weather affected homes and businesses across the parish.
Rain Rates That Trigger Street Flooding
Flash flood warnings in the New Orleans metro area are not issued lightly. On Thursday, the National Weather Service issued a flash flood warning covering Jefferson Parish, New Orleans, and Plaquemines Parish as strong storms moved through the region. The warning was set to expire at 5 p.m.
That concern matters because so much of the region depends on mechanical pumping just to keep streets passable. Standing water is not a passive inconvenience here; it is an operational problem that falls squarely on the Sewerage and Water Board of New Orleans, whose drainage system is only as reliable as the power feeding it.
The Power-to-Pumps Connection
The Sewerage and Water Board relies on Entergy for standard 60-Hz utility power, but its legacy drainage pumps still run on 25-Hz current, according to the Sewerage & Water Board of New Orleans. Frequency changers and backup generators bridge that gap, converting modern grid power into the older frequency those pumps require. During severe rainstorms, peak demand for that 25-Hz pump system reaches 44 megawatts, per the same agency, drawn from a mix of the board's own turbines and Entergy-supplied electricity.
The scale of the system underscores what is at stake when power gets disrupted. The board's drainage infrastructure includes pump stations and pumps connected to underground pipes that carry water to outfall canals and Lake Pontchartrain, according to the agency's published material. It remains unclear whether any pump stations experienced power interruptions during Thursday's storm.
A Grid Under Strain Before Storm Season Peaks
Thursday's outages land in the middle of a summer that has repeatedly tested the region's electrical infrastructure. On August 21, severe thunderstorms with 60 mph wind gusts knocked out power to more than 17,000 Entergy customers across Orleans and Jefferson parishes before crews made overnight repairs, as Hoodline previously reported. Just weeks later, a Labor Day storm system produced an EF-0 tornado with 85 mph winds in Hammond on September 7, causing nearly 5,000 outages in nearby Tangipahoa Parish and damaging a local business.
The timing is notable because Jefferson Parish is currently the site of Entergy Louisiana's newest infrastructure push. The utility launched a $270 million grid resilience project there on August 13, aiming to replace or reinforce roughly 8,400 distribution and transmission poles built to withstand 140 mph winds, with heavy focus on corridors like Veterans Boulevard. That project is part of Entergy Louisiana's broader grid-resilience work.
Entergy Louisiana serves customers across the region, including Jefferson Parish. Thursday's outages arrive as a fresh test of whether ongoing grid investments are keeping pace with a storm season that keeps delivering fast-moving, high-intensity systems to southeast Louisiana.
