Chatham Hurricane & Storm Risk: What's Known, What Genuinely Isn't

The Confirmed Gap: No Chatham-Specific Figures for 1938, Carol/Edna, or Bob

Stated plainly rather than glossed over: no source found in research for this page attaches a specific damage figure, wind reading, or storm-surge number to Chatham for the 1938 Hurricane, Hurricane Carol, Hurricane Edna, or Hurricane Bob. That's true across all of Chatham's villages and both of its coastlines - Atlantic-facing and Nantucket Sound-facing alike. What exists instead is regional Cape Cod-wide and Massachusetts-wide coverage of those storms, which is real, well-documented history - just not a Chatham-specific account of it.

That gap shouldn't be read as evidence Chatham was spared. An absence of a documented, town-specific figure isn't proof of no damage - it just means the specific record wasn't found in this research, despite a genuinely thorough search. Given Chatham's exposed position at the Cape's elbow, with direct oceanfront on two different bodies of water, it would be reasonable to assume all three storms affected the town in some way. But reasonable inference isn't a sourced number, and this page won't manufacture one, or borrow a neighboring town's figure and present it as Chatham's.

The Regional Benchmark Storms: 1938 and Bob (Cape-Wide Context)

What follows is regional context only - drawn from Cape Cod-wide sources, not Chatham-specific ones - included because it's the closest documented history to what Chatham's shoreline experienced, even without a town-specific figure to attach to it. The 1938 Hurricane, often called the "Long Island Express," made landfall as a Category 3 storm; storm tides ran 18 to 25 feet across the region, and parts of Falmouth sat under 8 feet of water. Those are Cape-wide and regional figures, covered in full on this site's Cape Cod hub page - no comparable number was found for Chatham specifically.

Hurricane Bob made landfall in Rhode Island on August 19, 1991 as a Category 2 storm and is the best-documented of the three at the regional level. Storm surge peaked at roughly 5.8 feet in Buzzards Bay, and Massachusetts sustained over $1 billion in damage with power outages affecting the entire Cape, some areas for two weeks or more - again, Cape-wide totals, not a confirmed Chatham number, even though it's reasonable to assume Bob caused real local effects given Chatham's exposed position.

The Barrier-Beach Breach Timeline: Chatham's Real, Storm-Driven Coastal Record

This is where Chatham's hurricane-and-storm story actually lives, and it's arguably more useful to a buyer than any single dollar figure: rather than one historic storm producing one historic damage total, Chatham's barrier beach has repeatedly, visibly broken and reformed in direct response to major coastal storms, in a documented, dated pattern spanning nearly 40 years. In January 1987, a powerful nor'easter broke the barrier beach immediately east of Chatham Light. The newly exposed mainland shoreline lost over 65 feet within a year, and at least one home was destroyed. That breach eventually produced today's Lighthouse Beach, formed when the northern tip of the old South Beach curved inward and welded onto the mainland by 1994.

In April 2007, a second, separate breach opened farther north near Allen Point, turning North Beach into an island and permanently cutting off vehicle access - it has been boat-access-only ever since, with erosion accelerating sharply on the newly isolated island. In 2013, South Beach was breached again, roughly 1.5 miles south of Chatham Light, separating it from South Monomoy Island; that breach now functions as a navigation channel for boaters. Then, on May 22, 2025 - a nor'easter, the same kind of storm that opened the original 1987 breach - tore open a new breach roughly 100 to 200 yards wide at the tip of North Beach Island. Chatham Harbormaster Jason Holm described it plainly: "The break just kind of clipped the tip of the island." A town assessment on May 28, 2025 found no sign of the new opening closing, and officials repositioned navigation buoys and warned boaters away from it. Add it up and Chatham's barrier beach has broken and reformed in a documented, dated way at least five times since 1987 - not a closed chapter of local history, but a live process that a major nor'easter reopened as recently as last year.

The Elbow: Storm Exposure From Two Directions at Once

Chatham sits at the "elbow" of Cape Cod, where the peninsula bends south, giving it something few other Cape towns have: real frontage on both the open Atlantic Ocean and Nantucket Sound in the same town. Monomoy National Wildlife Refuge's barrier islands extend roughly 8 miles off that elbow, taking the brunt of Atlantic wave action before it ever reaches the mainland - which is precisely the system that keeps breaching in the storms detailed above. That two-coastline geography is a genuinely different exposure profile than a single-coastline town facing only Nantucket Sound (as this site's Harwich hurricane-risk page documents) or only Cape Cod Bay - a hurricane or nor'easter tracking well east of the Cape can still push surge into Chatham's Atlantic side even when Sound-facing towns see comparatively little, and vice versa for a storm approaching from the south or southwest. This is a structural, geographic observation, not a claim backed by a Chatham-specific storm-surge measurement - no such measurement was found for either side of town in this research.

FEMA Flood Zones and CRS Status: A Related, Honestly Unconfirmed Gap

Given the sheer amount of direct oceanfront and barrier-beach frontage documented above, Chatham almost certainly carries substantial V-zone (high-hazard, wave-action) exposure - FEMA's strictest flood designation, generally barring new construction and capping reconstruction of existing structures at 50% of replacement value. But say this plainly rather than guess at it: no town-specific V-zone or A-zone acreage or percentage breakdown for Chatham was independently found in research behind this page.

Chatham's own FEMA NFIP/CRS program page (chatham-ma.gov/473) was blocked to direct research fetch, so this page can't state Chatham's current Community Rating System class or flood-insurance discount percentage as confirmed fact. There is one indirect data point worth mentioning carefully, labeled as an inference rather than a confirmation: this site's own Dennis research identifies Dennis, Bourne, Barnstable, and Falmouth as the four Cape towns still actively applying for CRS, and Chatham's absence from that list would suggest - but does not confirm - that Chatham already participates in CRS with some discount in place. This site's Chatham coastal-insurance page covers that CRS question in full depth; treat the note here as a pointer to that gap, not a repeat confirmation of a number that still isn't verified.

What This Page Cannot Tell You

To be direct about the limits of this page: it does not state a Chatham-specific damage figure, wind speed, or storm-surge height for the 1938 Hurricane, Hurricane Carol, Hurricane Edna, or Hurricane Bob, because none was found despite genuinely thorough searching. The regional figures above - 1938's 18-to-25-foot storm tides and Falmouth's 8 feet of water, Bob's roughly 5.8-foot Buzzards Bay surge and $1 billion-plus Massachusetts damage total - describe Cape Cod and Massachusetts broadly, not Chatham village, West Chatham, South Chatham, North Chatham, or Chatham Port specifically.

It also doesn't state a current FEMA CRS class or flood-insurance discount percentage for Chatham, because the town's own CRS page was blocked to direct research and only an indirect, non-confirming inference is available; and it doesn't state a town-specific V-zone or A-zone acreage or percentage breakdown, because none was found, even though the breach timeline above makes substantial V-zone exposure highly likely. Hurricane, nor'easter, and flood risk for any specific Chatham property should be assessed using current FEMA flood maps, MEMA evacuation-zone data, a licensed insurance professional, and the Town of Chatham's own floodplain and emergency-management materials - not assumptions carried over from a neighboring town, and not the regional history above treated as if it were a Chatham-specific record. Nothing on this page is insurance or engineering advice.