The State Health Department's phones have been overwhelmed with reports of possible cases of dengue fever, according to the Hawaii-Tribune Herald. This after two confirmed cases and four probable cases last week on the Big Island. Officials could have an update on lab testing numbers as early as tomorrow. The state epidemiologist says it's likely that an infected traveler mosquito infected the local population. Leading to the cases on the Big Island. The Health Department is conducting mosquito spraying and other prevention activities.