Flash Flood Warning Issued for Maui as Heavy Rain Impacts Mount Haleakala

Source: NOAA · Maui, Hawaii

According to the U.S. Census Bureau's American Community Survey (ACS) 5-year estimates, the CDC PLACES population-level health analysis, and the CMS Hospital Compare quality data, Areazine publishes editorial articles drawing on more than 19,000 U.S. city profiles. See our methodology for full source attribution and refresh cadence.

A Flash Flood Warning is in effect for the island of Maui until 8:00 PM HST Friday, with rainfall rates up to 2.5 inches per hour reported near Mount Haleakala.

What this NWS weather alert tells you, and what most readers miss

This notice was issued by NOAA on March 28, 2026 and geographically references Maui, Hawaii. Its severity classification of "high" signals how the issuing agency weighs the risk of harm if no action is taken — "critical" and "high" tier alerts typically carry direct consumer actions, while "medium" and "low" tend toward informational guidance or monitoring advisories. The category it belongs to — Weather Alerts — determines the regulatory framework behind it, which shapes what remedies (refunds, replacements, recalls, evacuations) are available to affected individuals and who holds statutory responsibility for enforcement.

Most readers skim a notice like this, check whether they are personally affected, and move on. The more useful lens is to read it as a data point about the issuing system: how quickly NOAA detected the hazard, how precise the geographic or product-identifier scope is, and whether similar notices have clustered in the same category or region in the last 90 days. Cluster patterns frequently precede a broader regulatory action — a single localized NWS weather alert is isolated; three of them within a quarter often indicate a supply-chain, infrastructure, or seasonal driver that will keep producing notices until something structural changes.

For decision-making, Areazine pairs each alert with the original agency URL, the full agency name, and a timestamp so you can verify the notice against the primary source before acting on it. Tags on this item (weather, alert, Flash Flood Warning, Maui) map to related alerts in the same area of risk — browsing them together gives a clearer picture than any single notice alone, because the shape of an ongoing issue only becomes visible across multiple sequential alerts.

Alert Details

The National Weather Service in Honolulu has issued a Flash Flood Warning for the island of Maui. This alert is classified as a severe threat with immediate urgency, as flash flooding is ongoing or expected to begin shortly.

Affected Areas

The warning covers the entire island of Maui in Maui County. Specific areas of concern include the south-facing slopes of Mount Haleakala, where Ukumehame Gulch has already risen significantly due to heavy precipitation.

What You Should Do

Residents and visitors in the warning area are advised to stay away from streams, rivers, drainage ditches, and culverts, even if they are currently dry. Be aware that flooding can occur in drainages, roads, and other low-lying areas. Public road closures are possible, and those in steep terrain should remain alert for potential landslides.

Expected Conditions

At 5:37 PM HST, radar indicated heavy rain falling over Maui at a rate of 1 to 2.5 inches per hour. The heaviest rainfall is concentrated over the southern slopes of Mount Haleakala. These conditions are likely to cause rapid flooding of streams and urban areas.

Timeline

The Flash Flood Warning was issued at 5:37 PM HST on March 13 and is currently scheduled to expire at 8:00 PM HST on March 13.

Original source: NOAA Official Notice ↗

All Weather Alerts →

Frequently Asked Questions

Common questions about this NWS weather alert.

What is this NWS weather alert about?
A Flash Flood Warning is in effect for the island of Maui until 8:00 PM HST Friday, with rainfall rates up to 2.5 inches per hour reported near Mount Haleakala.
Which agency issued this alert?
This alert was issued by NOAA. The original notice is available at the source link at the bottom of this article.
How severe is this alert?
This alert is classified as "high" severity. Take precautions and monitor for updates.
What area is affected?
This alert affects Maui, Hawaii. Check with NOAA for the most current geographic scope.
Where can I find more Weather Alerts updates?
Browse the full Weather Alerts feed on Areazine at areazine.com/weather/ for the latest updates from NOAA and other agencies.