First published Oct 30, 2026, 9:06:15 PM UTC · Last updated Oct 30, 2026, 9:06:15 PM UTC

Coastal and marine hazards

Coastal flood warning for the Florida Keys

Reported by U.S. National Weather Service Alerts NWS

The warning covers Monroe Upper, Middle, and Lower Keys through 5 AM EDT on October 31. Major saltwater flooding is expected; roads may close and low-lying property, including homes, businesses, and some critical infrastructure, may be inundated.

At a glance

Affected location: Florida Keys
The warning covers Monroe Upper, Middle, and Lower Keys through 5 AM EDT on October 31.

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Why it matters

The alert advises protecting flood-prone property and avoiding barricades or water of unknown depth when travel is required.

Location

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Generated scores

Scores are based on the cited reporting and use a 1–10 scale. Read the methodology.

Confidence: 7/10How certain the assessment is based on the clarity and evidence in the cited reporting.
Geographic reach: 3/10How widely the event reaches, from a local area (1) to worldwide impact (10).
Global importance: 2/10The event's broader significance, from limited importance (1) to major global importance (10).
Impact magnitude: 5/10The scale or severity of the real-world impact, from minor (1) to extreme (10).
Urgency: 7/10How time-sensitive the event is, from low urgency (1) to immediate attention needed (10).

Primary official sources

U.S. National Weather Service Alerts NWS Coastal Flood Warning issued October 30 at 4:56PM EDT until October 31 at 5:00AM EDT by NWS Key West FL

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Related developments reported in the last 30 days. These are not necessarily ongoing incidents.

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Coastal Flood Warning issued October 30 at 2:11AM EDT until October 31 at 5:00AM EDT by NWS Jacksonville FLOct 30, 2026, 6:11 AM UTC
A coastal flood warning covers areas in the St. Johns River Basin until 5 AM EDT Saturday. The source reports possible road closures and inundation of low-lying property, homes, businesses, and some critical infrastructure.
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Coastal Flood Warning issued October 29 at 5:38AM EDT until October 30 at 5:00AM EDT by NWS Key West FLOct 29, 2026, 9:38 AM UTC
A warning covers the Monroe Upper, Middle, and Lower Keys, with major saltwater flooding expected this evening. The source reports possible road closures and inundation of low-lying homes, businesses, and critical infrastructure.
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Coastal Flood Warning issued October 28 at 4:00AM EDT until October 29 at 5:00AM EDT by NWS Key West FLOct 28, 2026, 8:00 AM UTC
The warning covers the Upper, Middle and Lower Keys through 5 AM EDT October 29, with major saltwater flooding expected, especially around high tide. The source says roads may close and low-lying homes, businesses and some critical infrastructure may be inundated.
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Coastal Flood Warning issued October 28 at 2:48AM EDT until October 30 at 2:00AM EDT by NWS Jacksonville FLOct 28, 2026, 6:48 AM UTC
NWS Jacksonville issued a coastal flood warning through 5:00 AM EDT on October 31 for areas in the St. Johns River Basin. The alert says flooding may inundate low-lying homes, businesses, and infrastructure, and may close roads.

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