We turn in the meantime to the other breaking story this evening and you can see it behind me here, this giant hurricane barrelling towards Hawaii. If we scan the map you can look right behind it, the... See More
We turn in the meantime to the other breaking story this evening and you can see it behind me here, this giant hurricane barrelling towards Hawaii. If we scan the map you can look right behind it, the second hurricane, nearly 800,000 Americans in the eye have these storms. Hawaii hasn't had a direct hit in 20 years and now two of them. Tonight store shelves emptied, bottled water gone, just a few canned goods all that remain. Ginger zee with the timing for all of this but first ABC's Clayton Sandell is in Hawaii for us tonight. . Reporter: There is a state of emergency here, the weather about to take a dramatic turn for the worse as iselle takes a direct hit. Iselle is packing powerful winds, high surf and heavy rains all aiming right at paradise as not one but two hurricanes bear down on Hawaii, schools are closing and shelters opening. The governor has the national Guard on alert. We're prepared for immediate response. We have our resources in place. Reporter: For Jeff and Lori, here from satellieattle, the timing couldn't be worse. We're getting married Saturday evening at 6:00 P.M. The plan right now is to get married on the beach at sunset. Reporter: Across the islands they're scrambling to get ready, plywood to protect windows. There are long lines for gas and supplies like bottled water selling out quick. All the water is gone. We have about three five gallon drums that are empty right now. Reporter: So are the sand bags. These shop workers forced to im vies. Sand bags are sold out. I have a roll of duct tape. Reporter: Lori and Jeff say their wedding will happen, even if the ceremony gets moved to the lobby. Iselle and Julio are not a problem. Reporter: Right after that hurricane Julio will strike a glancing blow in the next 36 hours. Two hurricanes so close together. We're told that has never been seen here before. Those blue skies deceiving behind you. Thank you. Ginger, heard that number, 22 years since one hit and now not one but two. David, let me take you in. You've got Julio behind and iselle, about 800 miles apart right now. Julio is looking a little stronger, a category two. Look at this, iselle taking that path tonight right over the big island. You can see gusts up to 70 miles per hour. Then it moves just south of the other islands. Still could see tropical storm force winds. Check this out, we thought it was cool to see the topography, the two volcanos there and when you will see the winds from midnight hawaiian time. That Orange area tells you 58 miles per hour plus, a large portion of the big island. That's why we have a hurricane warning on the big island and tropical storm warnings back off to the west. I think the biggest impact will end up being flash flooding, mudslides around rain, again some of those wind gusts and waves could reach 25 feet. Back here at home I want to show you some pictures ut out of southern Illinois. They got lots of rain, flash flooding. This system moves in? In and to the east. We'll be on the lookout.
This transcript has been automatically generated and may not be 100% accurate.