For the first time since 1992, Hawaiians are preparing for the possibility of two tropical systems making landfall in one season.

First, it was Iselle, which made landfall on the Big Island back in August. Now, Tropical Storm Ana is approaching the state, threatening to become a hurricane and ready to cause disruptions for residents even if it remains a tropical storm.

"Tropical Storm Ana is currently moving to the west and is expected to turn toward the northwest by Friday, taking it in the direction of the Hawaiian Islands," said weather.com meteorologist Linda Lam. "Ana is expected to gradually strengthen and could still become a hurricane. Bands of rain may reach the Big Island as soon as late Friday and large swells are expected to begin to reach Hawaii late Thursday."

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As a result, Gov. Neil Abercrombie has declared an emergency for the state, according to the Associated Press. The proclamation will last through Oct. 24, allowing the state to access state and federal resources for preparation and recovery, if needed, the report adds.

Residents on the Big Island and Oahu have been urged to prepare for serious weather conditions that could be life-threatening if the proper precautions aren't taken, KITV.com reports.

"While it's a beautiful day today, I think by Saturday we're not going to be seeing this kind of weather, unless we are really lucky," said Honolulu Mayor Kirk Caldwell in the report.

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On the Big Island, residents in the Ka'u district on the southernmost portion of the island are scrambling to get ready for Ana. Workers are building a shelter at Ka'u High School, but they told KITV.com it won't be ready in time for this storm.

Even as Ana's final track toward Hawaii remains unclear, stores are stocking up with supplies in advance of residents making preparations, Hawaii News Now says.

"Bottled water, which we stock quite a lot, ropes, standard propane tanks, portable stoves, grills, typical charcoal, batteries would be the best and a lot of flashlights," said City Mill Kaimuki Supervisor Keven Self-Gomes in the report.

The Marine Corps has canceled a concert planned for this weekend at Kaneohe Bay, the AP also reported.

MORE ON WEATHER.COM: Hurricane Iselle