Fire breaks out aboard USS Zumwalt at Ingalls shipyard

A fire broke out aboard USS Zumwalt (DDG-1000) late Sunday night while the destroyer sat pierside at HII Ingalls Shipbuilding in Pascagoula, Mississippi, injuring three sailors.

The blaze was reported at approximately 9:45 p.m. on April 19, 2026, and was extinguished by the ship’s crew before outside fire services were needed. One sailor was transported to a local hospital for treatment and remains in stable condition. The two others received first aid at the scene. The Navy confirmed the incident publicly on Wednesday, April 22, through a statement to USNI News from U.S. Naval Surface Forces.

“The Navy is investigating the cause of the fire and determining the extent of the damage onboard,” the statement reads. No further details on the origin or scope of the fire have been released. The investigation is ongoing.

USS Zumwalt is currently at Ingalls undergoing the final stages of a sweeping modernization that has transformed the ship from a troubled stealth destroyer into the U.S. Navy’s first surface combatant capable of firing hypersonic missiles. The ship arrived at Pascagoula in August 2023 for that work, was moved onto land shortly after arrival for major structural modifications, and was undocked in December 2024. In January 2026 — just three months ago — Zumwalt departed Ingalls on January 15 for builder’s sea trials, returning the following day. It was the ship’s first time underway in nearly three years. Ingalls Shipbuilding president Brian Blanchette called it “a pivotal milestone” and described Zumwalt as “the U.S. Navy’s first warship with hypersonic capabilities.”

The modernization that fire now potentially threatens involved gutting the ship’s original armament and rebuilding its offensive core. The Navy replaced Zumwalt’s twin 155mm Advanced Gun Systems — the original reason the ship existed, designed to fire precision-guided shells at land targets from the sea — with new missile tubes housing the Conventional Prompt Strike weapon system. CPS is a hypersonic glide vehicle that flies at roughly five times the speed of sound and can strike targets approximately 1,725 miles away. Each of Zumwalt’s four Advanced Payload Module canisters holds three CPS missiles, giving the ship a magazine of 12 hypersonic rounds — a strike capability no surface warship in any navy currently possesses in operational form.

The decision to make this conversion reflected a fundamental rethinking of what the Zumwalt class is for. The original concept was shore bombardment — a stealthy ship delivering naval gunfire deep onto land. When the ammunition for the Advanced Gun Systems proved prohibitively expensive and the program was cancelled, the ships were left without a primary mission. The hypersonic conversion gave them one: long-range precision strike against high-value targets, at ranges and speeds that compress an adversary’s reaction time to near-zero. A destroyer that can launch a Mach 5 weapon from 1,700 miles away is a fundamentally different strategic tool than one designed to lob shells at a beach.

The fire’s location aboard the ship and any resulting damage to systems or structure have not been disclosed. Given that Zumwalt returned from builder’s sea trials just months ago and is presumably in the final stretch of preparations before delivery back to the fleet, even minor fire damage in the wrong location could require additional time at the shipyard for assessment and repair. The Navy’s investigation will need to determine not only what caused the fire but whether any of the ship’s newly installed systems — including the CPS integration and associated combat systems — were affected.

USS Zumwalt is not the only ship of its class undergoing this transformation. USS Lyndon B. Johnson (DDG-1002) is also at Ingalls working through combat system activation and CPS missile tube installation, with final delivery expected in the first quarter of fiscal year 2027. USS Michael Monsoor (DDG-1001) remains in San Diego and is scheduled for its own CPS installation in a future availability. The Navy’s plan calls for all three Zumwalt-class destroyers to carry the hypersonic strike capability by fiscal year 2028 — a program timeline that depends on each ship moving through its respective modernization without major setbacks.

Ingalls Shipbuilding has dealt with notable shipyard incidents before, including the rebuilding of USS Cole (DDG-67) after the 2000 terrorist attack in Aden and repairs to USS Fitzgerald (DDG-62) following a 2017 collision at sea. Those were far more severe events with far more catastrophic damage. Sunday’s fire, at least as currently described, does not approach that scale — three sailors treated, the blaze extinguished by the crew, no mention of structural damage significant enough to halt work. But the Navy has not yet determined the extent of damage onboard, and the investigation is what will tell the real story.