Hawaii Dental Office Hurricane and Outage Plan: Power Shutoffs, Internet Cuts and the June-to-November Season

It is Thursday afternoon at a dental office in Kailua-Kona. An email from Hawaiian Electric says tomorrow's dry, windy forecast may put your street in a Public Safety Power Shutoff. Twelve patients are booked, the server sits under the front desk, and nobody is sure last night's backup left the building.

Looking for Legend Networking's service page instead? It is dental IT support for Hawaii practices. This guide is the plan, written for owners and office managers from Honolulu to Hilo and Kīhei, and it sits inside our Honolulu and Hawaii dental IT guide. Everything below is practical: tables, checklists and an outage card you can print and tape inside the supply closet. It is not legal or insurance advice, and it gives no battery runtimes or recovery times, because those depend on your own equipment and contracts.

What can take a Hawaii dental office offline, and how much warning do you get?

Four events take Hawaii dental offices offline: hurricanes and tropical storms, Public Safety Power Shutoffs, everyday utility outages and internet cuts. They give very different warning. A hurricane watch comes about two days before tropical-storm-force winds. A shutoff "may occur with little or no notice". A severed cable gives no warning at all.

That difference is the whole reason one generic "disaster plan" fails on the islands. A plan written for a hurricane assumes you have a day to back up, shut down and move equipment. A shutoff on a windy afternoon may give you an hour. A construction crew cutting a fiber line gives you nothing, and the power stays on while the schedule disappears. The table sorts the work by event so staff know which row they are in.

Table 1. Four ways a Hawaii dental office goes dark

Two cells in that table do the most work: the backup you have actually restored from, and the printed card. Every other section of this plan feeds one of them.

When is hurricane season in Hawaii, and what does the 2026 outlook say?

Hurricane season in Hawaii runs from June 1 to November 30. NOAA's Central Pacific forecasters put the 2026 odds at 70% above normal, 20% near normal and 10% below normal, and expect 5 to 13 tropical cyclones across the central Pacific. It is not a landfall forecast.

That last line matters for an office manager. NOAA says the outlook "does not indicate where or when any storms may affect land." A busy season in the central Pacific does not mean a storm will reach Oʻahu or Maui, and a quiet one does not mean it won't. Use the outlook as a reason to do your preparation early in the season, not as a prediction for your street.

What a dental office does with the season, month by month

A note on time zones, because hurricane season is when it bites. Hawaii keeps standard time all year. While the mainland is on daylight time (second Sunday of March to first Sunday of November), the gap to Dallas is five hours; in winter it narrows to four. Most of the season falls in the five-hour stretch. A 7 a.m. call from Honolulu does not wait for a mainland office to open: Legend Networking, headquartered in Dallas, Texas, keeps its helpdesk staffed 24/7 at 1-800-794-1588. Put the number on the card anyway: in a storm, nobody wants to search for it.

What is a Public Safety Power Shutoff, and which dental areas were in the first zones?

When strong wind and dry conditions make its lines a fire risk, Hawaiian Electric can cut power on purpose in mapped high-wildfire-risk areas: that is a Public Safety Power Shutoff, in place since July 1, 2024. Notice can be short (a shutoff "may occur with little or no notice") and power could stay off "several hours, possibly even days."

For a dental office, a shutoff behaves like a storm outage with less warning and better weather. Patients can still drive to you, your phones may ring, and the building is fine, but nothing that plugs in works. The question is not whether to close; it is whether your data is safe when the power drops and whether you can tell patients quickly.

Areas Hawaiian Electric named at launch in 2024

These were the launch areas. Hawaiian Electric says it has mapped high-risk areas on each island, and the City and County of Honolulu notes that a shutoff "could impact the entire area or only selected segments", so check the current map on its PSPS page for your own address rather than relying on this list. If your practice is in Kailua-Kona, Waimea on Hawaiʻi Island, Lahaina, Kīhei, Pukalani or along the Waiʻanae Coast, assume you should check.

PSPS checklist for a dental office

• • [ ] Confirm the practice's account with Hawaiian Electric has a current email and mobile number for the office manager and the owner. Notices go out by email, phone call and text, and through the app.
• • [ ] Look up the office address on the PSPS map at the start of each dry season, and again if you move.
• • [ ] Decide in advance who has authority to close the office when a shutoff notice arrives, and who calls the day's patients.
• • [ ] Make sure the server and network gear are on a UPS that can signal the server to shut down cleanly. The point is a clean shutdown, not running the office on batteries.
• • [ ] When a notice arrives, run or confirm a backup while the power is still on, then shut down in card order.
• • [ ] Keep the PSPS hotline, 1-844-483-8666, on the outage card.

On Oʻahu, the City and County of Honolulu says it will use its HNL.Info alert system once Hawaiian Electric decides to implement a shutoff. Sign the office manager's phone up for it.

Why does a Kauaʻi office's plan point at KIUC instead of Hawaiian Electric?

Kauaʻi has its own utility. Kauaʻi Island Utility Cooperative (KIUC) is a member-owned electric cooperative formed in November 2002 and the only electric co-op in Hawaiʻi. Everywhere else in the state (Oʻahu, Hawaiʻi Island and Maui County) the utility is Hawaiian Electric. A Līhuʻe or Kapaʻa practice copying an Oʻahu plan would bookmark the wrong outage map.

It sounds small, but the outage card is only useful if every number and web address on it is right for your island. The Kauaʻi version names KIUC's Outage Center. Cards for the other islands point to the matching Hawaiian Electric map. A practice group with offices on two islands needs two cards.

Hawaiian Electric counted 474,241 customers across its islands at December 31, 2025, and says it provides electricity for 95% of the state's residents. Its outage page keeps separate maps for Oʻahu, Maui County and Hawaiʻi Island, plus an app with outage reporting. PSPS, as described above, is a Hawaiian Electric program; a Kauaʻi office should check KIUC's own notices for anything similar rather than assume the same rules apply.

Who to watch, island by island

Write these into your own card with the exact page your office uses. If an address changes, update the card the same week.

What happens to cloud and server-based practice software when the internet link drops?

It depends on where the software runs. If your practice-management database sits on a server in the office, charting and the schedule can keep working across the office network while the internet is down. Claims, email, cloud backup and remote support stop. If the software is cloud-hosted, the schedule and charts stop with the internet.

Hawaii has a particular reason to plan for this. On July 27, 2010, an inter-island cable was severed about 30 miles off Kīhei, and service was disrupted for about 400,000 Oceanic Time Warner Cable customers. Oʻahu and Kauaʻi were back by 8 a.m.; Maui and Hawaiʻi Island not until the afternoon. Twelve years later, on July 26, 2022, a construction crew cut a Hawaiian Telcom fiber line in a remote area near Waikoloa Village, and internet and voice problems followed on Hawaiʻi Island and in Hāna on Maui. Neither event is current, and networks have changed since, but both show the pattern: a single cut far from your office can stop it.

What still works when only the internet is down

Three habits cover most of that table. First, a second internet connection from a different provider or a different technology, so one cut does not take both. On Oʻahu, providers listed for business internet include Hawaiian Telcom, Spectrum Business and AT&T Business; ask each whether its line follows a different physical path from the other into your building. A cellular or satellite connection can serve as the backup on neighbor islands where choices are fewer. Second, each evening, print tomorrow's schedule with patient phone numbers, or save it to a laptop that does not need the internet to open it. Third, know how to tell an office fault from a provider fault: if a phone on cellular data can reach the web and the office cannot, call the ISP's business line on the card.

On an ordinary day, when the line simply drops, work through what to do when the dental office internet is down step by step. Building that second path with automatic failover at the firewall is the job of Legend's dental office network design service. And if you are weighing whether a monthly plan should include watching both connections, our article on managed IT for Honolulu dental practices goes through what to put in writing.

Which systems should be shut down, protected or moved before a storm?

Before a forecast storm or a shutoff, confirm the backup, then close the practice software on every workstation, shut down imaging PCs and workstations, shut down the server last, then the network equipment and phones. Unplug everything from the wall, lift it off the floor, cover it and photograph serial numbers. The order protects the database.

A practice-management database is most at risk when the power drops while it is open. That is why the order matters more than the speed. Use this list as the shutdown order on your outage card and adjust it for your own equipment.

Pre-storm shutdown order (print this)

1. 1. Confirm the backup. Check that last night's backup finished and that the off-site copy is dated today or last night. If it is not, run one now and wait for it.
2. 1. Close the practice-management software on every workstation, including any left logged in at the chairs and the front desk.
3. 1. Close the imaging software on each operatory and panoramic or CBCT acquisition PC, then shut those PCs down. Leave sensors and their cables in a drawer, not on the floor.
4. 1. Shut down all other workstations and laptops. Take any laptop that holds the printed-schedule copy home with the office manager.
5. 1. Shut down the server, last of the computers, after everyone is out of the software. If the IT provider manages it remotely, call the helpdesk and ask them to confirm it is down cleanly.
6. 1. Turn off the network equipment and internet phones: switches, the firewall, the wireless access points, the modem and the phone system.
7. 1. Switch off and unplug the UPS units once everything they power is off.
8. 1. Unplug everything from the wall. A surge when power comes back can damage equipment even through a power strip.
9. 1. Lift equipment off the floor onto counters or shelves away from windows, and cover it with plastic sheeting. Move what you can to an interior room.
10. 1. Photograph each device with its serial number label and the cables behind it, and save the photos off-site. They help with insurance and with putting the office back together.

Protect, move or leave: a quick sort

A word on generators and batteries. HI-EMA's business guidance lists "electrical backup systems" as part of a continuity plan. For most dental offices, that means a UPS on the server and network equipment so they can shut down cleanly, not a plan to run the office through an outage. If you lease space, ask the landlord whether the building has a generator, what it powers, and whether your suite is on it. Ask your electrician and your IT provider together before connecting computers to any generator. This guide gives no runtime or sizing figures: they depend entirely on your equipment.

How do you prove your backups will restore before the season starts?

You prove a backup by restoring from it. Before June 1, ask your IT provider to restore the practice database and a sample of X-rays from the off-site copy to a test machine, have a staff member open a real patient's chart and images, and record the date, what was restored and who checked it.

A backup report that says "success" means a file was written. It does not mean your practice could open on a different computer next week with every chart and image intact. Hawaii adds two reasons to test: replacement hardware can take longer to arrive on the islands, and an inter-island or island-wide internet problem can slow any download. You want to know before the season, not during it, how the restore actually goes.

Restore-test checklist

• • [ ] Where is the off-site copy? Write down the provider or location, and confirm it is outside your building and outside your island's single point of failure where practical.
• • [ ] What is in it? The practice-management database, the imaging archive, documents and scanned forms, the accounting files and the configuration of the server.
• • [ ] How fresh is it? Check the date of the most recent off-site copy. Ask how often it runs and what alerts if it fails.
• • [ ] Restore a real sample. The full practice database plus X-rays from a date at least a few months back, to a machine that is not the server.
• • [ ] Open it. A staff member opens a known patient's chart, ledger and images in the restored copy.
• • [ ] Who holds the keys? Write down who has the backup account's login and the encryption key or password, and make sure at least two people can reach them, one of whom is not in the office.
• • [ ] Record it. Date, scope, who checked, any problems, and what was fixed.

Backup design in more depth, for any US practice, is in the dental backup and disaster recovery checklist. Legend's dental backup and recovery service describes the service side; Legend lists backup protection from $39.99 per month (storage-dependent). HI-EMA's guidance points the same way for any business: it recommends "digital file backups to protect work, financial records and to document valuable property."

How do you turn Hawaii's emergency-management advice into a dental office checklist?

HI-EMA, the state's emergency management agency, asks businesses to plan three things: protecting employees, keeping digital file backups, and a continuity-of-operations plan covering employee communication, alternate work sites and electrical backup systems. For a dental office, that becomes a call tree, a tested PMS and imaging backup, and a written plan for phones and reopening.

HI-EMA's three elements, as a dental office checklist

This is a short list on purpose. A plan that fits on two pages gets read. A forty-page binder tends to sit on a shelf behind the front desk, unread, until the day it is needed.

What should the office do in the first hour after power or internet returns?

When the power or internet comes back, bring the network up first, then the server, then workstations and imaging PCs. Check that the practice software opens, last night's backup ran, imaging sensors capture, and printers and phones work. Undo any phone forwarding. Then call your IT provider's helpdesk with anything that did not come back.

Power often returns in steps, and a flicker in the first minutes is common. Give it a little time before you plug everything back in, and bring things up in order so you can tell which piece failed.

First-hour reopening checklist

1. 1. Look before you plug in. Check for water near equipment and outlets. Anything that got wet stays off until it is checked.
2. 1. Plug the UPS units back in and let them charge for a while before you rely on them.
3. 1. Start the network: modem, firewall, switches, then the wireless access points. Confirm the internet works from one computer.
4. 1. Start the server. Wait until it has fully started before turning on workstations.
5. 1. Start workstations and open the practice software at the front desk. Check today's schedule against the printed copy.
6. 1. Start imaging PCs and test each sensor and the panoramic unit with a test capture. Sensor and device drivers are a common thing to fail after a hard shutdown.
7. 1. Check backups: confirm the backup job is running again and the off-site copy is current.
8. 1. Test phones, printers, card terminals and the e-claims connection.
9. 1. Remove call forwarding so patients reach the front desk again.
10. 1. Call the helpdesk with anything that is still wrong, and write down what failed for the end-of-season review.

Legend Networking's helpdesk is staffed 24/7 at 1-800-794-1588, alongside 24/7 monitoring. Legend has in-house engineers; no outsourced first-level triage. Its published delivery terms are onsite dispatch by appointment across served dental markets; remote-first nationwide. Legend Networking has served over 3,500 practices since 2004, and its Google profile shows a 4.8 rating · 173 Google reviews. This guide's author is Ian Lynch — 22 years in dental IT; oversees the NOC, onsite dispatch and client technology roadmaps. For how monitoring and helpdesk calls differ in practice, see our article on 24/7 monitoring vs dental IT support, and Legend's dental IT helpdesk service page. To see how this fits a practice anywhere on the islands, the page for Honolulu dental IT services has the details.

What should a new or relocating practice check about outages before signing a lease?

Before signing, check whether the address falls in a mapped PSPS area, which internet providers can bring service into the building and by which route, whether the building has a generator and what it powers, and where the server and network rack would sit relative to flooding and windows.

Those four answers are far cheaper to get before the lease than after the walls close. Ask the landlord in writing about the generator and any history of water in the suite. Ask two ISPs to confirm service to the exact unit, not just the street. Put the network closet on an interior wall, off the floor. Our dental startup IT in Hawaii guide takes a new office through the full build order, including hardware lead times when equipment ships from the mainland.

The Hawaii dental office outage card

Print one card per office on a single page. Laminate it. Keep one copy inside the supply closet door, one at the front desk and one at home with the office manager.

Hawaii dental office outage card

What to ask your IT provider before hurricane season

Key takeaways

• • A Hawaii dental office needs one plan with four rows: hurricane, Public Safety Power Shutoff, utility outage and internet cut. Each gives different warning.
• • The central Pacific season is June 1 to November 30, and NOAA's 2026 outlook leans above normal without forecasting any landfall.
• • Check the right utility: KIUC on Kauaʻi; Hawaiian Electric, and its PSPS page, on Oʻahu, Hawaiʻi Island and Maui County.
• • A backup counts only once you have restored from it. Test before June 1 and record the result.
• • Shut down in order with the server last, bring systems back with the network first, and keep both orders on a printed card.
• • A second internet connection on a different path, plus a printed schedule each evening, covers most internet cuts.

Sources

• • NOAA / National Weather Service Honolulu, 2026 Central Pacific Hurricane Season Outlook, accessed 2026-10-26.
• • National Weather Service, Hurricane watches and warnings, accessed 2026-10-26.
• • Hawaii Emergency Management Agency, Prepare Your Business, accessed 2026-10-26.
• • Hawaiian Electric, Public Safety Power Shutoff program starts July 1 (2024 release), PSPS page, Power Outages and Power Facts, accessed 2026-10-26.
• • Kauaʻi Island Utility Cooperative, kiuc.coop, accessed 2026-10-26.
• • City and County of Honolulu, Public Safety Power Shutoff, accessed 2026-10-26.
• • Honolulu Star-Advertiser, Severed deep-sea cable disrupts service, July 28, 2010, accessed 2026-10-26.
• • Maui Now, Construction work accidentally severs fiber cable, impacting Hāna, Maui and Big Island, July 26, 2022, accessed 2026-10-26.
• • NIST, Daylight Saving Time, accessed 2026-10-26.