A mixed bag of Hawaii health alerts and local news, plus one oddball story from overseas — none of it good news for residents or a longtime local business.

• Two Legionnaires' disease cases were linked to a Kauai vacation rental's water system, and health officials are asking anyone who stayed there since January 2025 to come forward.
• Oahu logged its 11th travel-related dengue case of the year; local spread risk is low, but officials are urging people to dump standing water to keep mosquitoes from breeding.
• A University of Basel study found people who took daily cold showers got sick less often and used less energy, potentially trimming utility bills.
• Good Guys Music, a 27-year-old Hawaii instrument and gear shop, is closing at year's end after the post-COVID economy made it hard to stay afloat; the owner says he's open to selling if someone wants to keep it running.
• In the Maldives, divers were filmed brawling 50 feet underwater, with one accusing another of trying to rip off his mask and grab his breathing mouthpiece; authorities are investigating.

Outlook: Health officials will keep tracking Legionnaires' and dengue cases, while Good Guys Music's fate depends on whether a buyer steps forward before the shop closes.