Tropical storm-force winds affected much of the state as Iselle moved through, except
Niihau, the rest of the
Hawaiian Islands all reporting gusts over . Hurricane-force winds were confined to
Mauna Kea on the Big Island, where a peak gust of was observed. Heavy rains affected most of the southern islands, with some areas of the Big Island seeing more than due to
orographic lift from the southerly flow on the backside of Iselle. The greatest total was at the
Hakalau Forest National Wildlife Refuge, where was observed. Areas on the
leeward side of the island saw substantially less rain;
Kona International Airport received only during the storm's passage. Kauai saw rains in excess of in several areas and a maximum of at a
United States Geological Survey station along the Kilohana Ridge. Totals peaked at to the north on Oahu, while Molokai and Lanai received generally negligible totals. Swells from hurricanes Iselle and Julio also produced waves along the eastern shores of the Hawaiian islands. These winds also felled power lines, causing widespread outages impacting roughly 23,000 electricity customers. A geothermal plant in Puna released toxic
hydrogen sulfide gases upon losing its power sources, prompting officials to urge an exodus of the immediate area, although a number of nearby residents reported health impacts. A water treatment plant in
Kula on Maui also shut down due to power failure, prompting the conservation of water supplies in that area. Iselle's winds also damaged about 1,000 coffee trees and over 2,000
macadamia trees. Damage was heaviest to the
papaya crop, with about 60% of the statewide crop destroyed, accounting for $55 million in losses (2014
USD). Other crops, including coffee, macadamia nuts, and flowers, were also damaged, Only one known death took place as a direct result of the storm – a 19-year-old woman who was swept away by flood waters while hiking in a closed state park. Over 250 property owners reported damage, with at least 11 houses destroyed, and 28 with major damage. Total monetary losses in the State of Hawaii range between $148 million and $325 million. and the primary election occurred as scheduled. However, the storm damaged roads leading to two polling stations on the Big Island, prompting officials to decide the election by
absentee ballot in those areas. After a close campaign between incumbent
Senator Brian Schatz and
Congresswoman Colleen Hanabusa, the
senate primary, held on the same day as the gubernatorial primary, was too close to call after Schatz led by only 1,635 votes. As a result, the election hinged on the two closed polling stations, where more than 8,000 people had the option to vote by mail. This was later changed to an in-person vote for August 15, despite a challenge from the Hanabusa campaign with regards to storm damage, and Schatz ultimately won. The Hawaii
American Civil Liberties Union later sued the state over how they handled the election. ==Aftermath and records==