Entergy says Hurricane Isaac has knocked out power to more than 450,000 residential and commercial in southeast Louisiana.
The company's website indicates that those included more than 150,000 in New Orleans, about 160,000 in Jefferson Parish, some 15,700 in St. Bernard, about 10,800 in Plaquemines, 27,300 in Lafourche, 16,000 in St. Charles, 16,700 in St. John the Baptist and 17,700 in Terrebonne Parish.
Officials say crews are not able to start repairs until winds drop below 30 or 35 mph, which is likely to be Thursday at the earliest.
The U.S. Nuclear Regulatory Commission says a nuclear power plant west of New Orleans was shut down because of the threat from Hurricane Isaac, but two others in or near the hurricane's path remain at full power.
The NRC says the Waterford 3 plant in Taft, La., began a controlled shutdown at 3 p.m. Tuesday. The plant is about 20 miles west of New Orleans in St. Charles Parish.
The NRC says the River Bend plant, about 25 miles northwest of Baton Rouge, La., and Grand Gulf, near Port Gibson, Miss., remain at full power.
Utility crews are surveying the power lines and thousands of utility workers from other states are on standby, as Louisiana power companies readied for Tropical Storm Isaac.
Fresh in minds around the state's capital city was Hurricane Gustav, which struck as a Category 2 storm in 2008 — and surprised Baton Rouge with power outages that lasted 10 days or more in many areas.
Public Service Commissioner Jimmy Field, who represents the Baton Rouge area, says he's confident power companies are ready for Isaac, expected to strike as a hurricane.
A federal appeals court has rejected an effort by Louisiana utility regulators to make Entergy Corp. subsidiaries in Arkansas and Mississippi pay for ending an agreement with their Entergy counterparts in Louisiana and Texas.
The ruling Tuesday by an appeals court in Washington deals with an agreement requiring the separate Entergy utilities to offer roughly equal electricity rates. At times, this has resulted in Entergy Arkansas making payments to Entergy affiliates with higher production costs — causing Arkansas customers to pay more.
Louisiana has so far avoided disastrous drought conditions declared in nearly half the counties in the United States. But southeast Louisiana is starting to feel the effects of a lower Mississippi River.
Entergy Corp.'s net income rose 16 percent in the second quarter after the power company received favorable tax terms on financing costs for fixing damage to lines and equipment caused by hurricanes Katrina and Rita.
The increase also reflected stronger sales to Entergy's utility customers.
The New Orleans-based company reported Tuesday that its net income rose to $365 million, or $2.06 per share, for the three months ended June 30, up from $315.6 million, or $1.76 per share, a year ago.