(Bloomberg) -- Hurricane Irma has knocked out power to atleast 6.4 million customers, paralyzed tanker traffic, shutteredgasoline stations and suppressed demand for natural gas.

As the storm headed up Florida’s west coast, it also threatenedmore than $1 billion worth of crops.

Power challenges

NextEra Energy Inc.’s Florida Power & Light utility warnedSunday that some customers may go without power for weeks, andparts of its system may need to be rebuilt “from the groundup.”

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NextEra took two reactors offline at a nuclear plant south ofMiami, one for reasons unrelated to the storm. Ports critical tosupplying the state with gasoline and diesel were also closed, andenergy companies including Exxon Mobil Corp. and Kinder Morgan Inc.shut fuel terminals and pipelines.

“Fuel deliveries in Florida are virtually nonexistent,”Mansfield Oil, a Georgia-based energy supplier, said in a report.“Markets will take time to fully recover, particularly if Irmadamages fueling infrastructure.”

Irma weakened into a tropical storm as it moved over northernFlorida and Georgia. It has sapped natural gas demand by cuttinguse from power plants, and may also wreak havoc on Florida’sfarmlands, menacing $1.2 billion worth of production in the topU.S. grower of tomatoes, oranges, green beans, cucumbers, squashand sugar cane.

Widespread citrus crop damage

Florida citrus crops probably suffered “widespread damage” fromflooding and strong winds, Kenny Miller, a meteorologist at MDAWeather Services in Gaithersburg, Md., said in a telephoneinterview.

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Florida’s orange, grapefruit and other citrus trees are full ofdeveloping fruit that Irma may blow away. Winds could also destroythe trees themselves in a region that accounts for almost 10% ofthe nation’s fruit and vegetable farmland. Orange-juice futuresfell Monday after rallying last week ahead of the storm.

Ports closed, fuel challenges

Meanwhile, ports and terminals including Miami, Tampa, St.Petersburg, Port Everglades, Jacksonville and Charleston, SouthCarolina, were closed to traffic. Florida, which depends wholly onpipelines and tankers for fuel supplies, was already facing fuelchallenges after Hurricane Harvey knocked offline refining capacityin the Gulf Coast.

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Kinder Morgan shut a pipeline system that carries gasoline,ethanol, diesel and jet fuel to land-locked Orlando from Tampa; allof its fuel terminals in Florida; and the Elba Island liquefiednatural gas plant in Georgia.

Demand for gas to fuel power plants in Florida, Georgia, SouthCarolina and North Carolina dropped to about 3.77 billion cubicfeet Sunday, the lowest in data going back to 2014, according toBloomberg New Energy Finance.

Complexity of restoring electricity

Florida Power & Light said in a press conference broadcastonline Sunday that restoring electricity will be “one of the mostcomplex” endeavors the utility’s ever faced. The feed to thebroadcast itself cut out for several minutes due to a powerfailure.

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“Unfortunately, we are not immune to Irma’s wrath," Rob Gould, aspokesman for the utility, said after the feed for the webcast hadbeen restored.

Other storm-related impacts

• About 42% of Florida’s retail gasoline stations had run out offuel as of 10:30 a.m. local time, said Patrick DeHaan, a seniorpetroleum analyst at GasBuddy.com.
• About 21% of the state’s gas stations had no power.
• In Georgia, 15% of stations didn’t have gasoline.
• The Florida Department of Agriculture and Consumer Servicessaid information on crop damage wasn’t yet available.
• Southern’s Vogtle and Hatch nuclear power plants in Georgiaremained online.
• Enbridge Inc. said its Sabal Trail pipeline, which suppliesnatural gas to Florida, is still delivering.
• Duke Energy Corp., which also runs a utility in Florida, saidthat more than 1.2 million of its customers have lost power andrestoration could take a week or longer.
• Sanderson Farms halted operations at its chicken-processingplant in Moultrie, Georgia, and will decide by Monday afternoonwhether to restart operations Tuesday.