NEW ORLEANS (REUTERS) - Hurricane Zeta tore across the US South on Thursday (Oct 29) with strong winds that left a trail of downed trees, snapped power lines and killed at least three people.

The storm brought 175kmh winds to the Louisiana coast and knocked out power to 2.4 million people from Louisiana to North Carolina.

A New Orleans man died after touching a live power line, while two others were killed in Mississippi and Georgia from the coastal storm surge and a wind-felled tree, police reported.

Crews overnight cleared major roadways of tree limbs and snapped electrical lines as residents hauled wind-swept debris to the curb in New Orleans. One man was injured when an apartment building collapsed.

Zeta is the fifth named storm to strike Louisiana this year and the 27th named storm this season, one less than the record set in 2005. Hurricanes are getting stronger and spinning slower, as they pick up energy from the heat in the oceans due to climate change.

"It has not been a great year for the energy or the insurance industries," said Andrew Siffert, a vice president at reinsurance brokerage BMS Group. Insured damages from this year's parade of storms will approach US$25 billion, he estimated.

Zeta spun up in the Caribbean Sea and went from tropical storm to a damaging, Category 2 hurricane in less than four days. It struck Mexico's Yucatan Peninsula and raced across the Gulf of Mexico.

The storm steamed over warm Gulf waters at up to 32kmh riding a steering current that propelled it over the Appalachian Mountains. It will bring strong damaging winds to the Carolinas and southeastern Virginia, the NHC said.

The eight named storms that entered the US Gulf of Mexico since June have caused repeated offshore evacuations and cut millions of barrels of US oil and gas output.

Zeta on Thursday had shut 85% of offshore US Gulf of Mexico oil production and led energy producers to turn off undersea pipelines and evacuate workers from 230 offshore platforms and drilling rigs, the US offshore regulator said.

US oil companies including Hess Corp and W&T Offshore have cited the repeated Gulf Coast storms since June for missing production targets.