Plant & Refinery Explosions Tripled in Frequency from 2018-2022

Of the 10 highest-capacity U.S. refineries, 7 are located in Texas or Louisiana. These states provide much of the hydrocarbon people use nationwide, which is why those industries feature so heavily in our work. Our firm recently started researching industry trends to better understand where the industry is going.

In a startling revelation, existing data indicates a threefold increase in fires and explosions at oil, gas, and petrochemical plants in Texas and Louisiana between 2018 and 2022 compared to the previous five years. In a nation where the average refinery has seen four decades of wear and tear, this trend is not just an alarming statistic—it’s a ticking time bomb with devastating consequences.

Texas & Louisiana — 2013–2023
Fires & Explosions at Oil, Gas & Petrochemical Plants
Arnold & Itkin analysis of incident reports from CSB, OSHA, local news, and oil-and-gas watchdog records.
2013–2017
11
incidents
2018–2022
40
incidents — 3× increase
Share of all incidents occurring in 2018–2022
40 of 51 total incidents — 78.3% — occurred in just the final five years of the decade studied
2023 — the trend accelerates
As of June 2023, the incident rate for the year had already equaled the entirety of 2022’s incident count — suggesting the acceleration has not slowed.
Source: Arnold & Itkin internal analysis; CSB, OSHA, and public incident records

Aging Infrastructure Increases Risk of ‘Losses’

A 2020 report on the hydrocarbon industry shows that ‘loss’ frequency—a euphemism for property damage caused by fires, explosions, chemical spills, and other accidents—forms a “bathtub curve.” When a facility is new, accidents occur due to operational errors or lack of procedural familiarity. These accidents decrease over time until they hit a sudden spike after a facility has been around for 30 years, when a facility starts to age. At these plants, failure of mechanical integrity accounts for 65% of losses.

Hydrocarbon industry risk model
The Bathtub Curve: Why Old Refineries Fail
Loss frequency follows a predictable pattern: early operational errors give way to a stable period, then spike sharply once a facility crosses the 30-year threshold. At aging plants, mechanical integrity failure accounts for 65% of all losses.
A U-shaped curve showing accident frequency over facility age. The left side starts high (early operational errors), slopes downward through a long stable middle section, then rises steeply on the right side after the 30-year mark (mechanical integrity failure). The current U.S. average refinery age of 40 years is marked on the right slope, well into the danger zone. Accident Frequency Facility Age (Years) 0 10 20 30 40 50+ 30-yr threshold spike begins U.S. avg: 40 yrs Early operational errors Stable period Mechanical integrity failure
At aging facilities
65% of all losses are attributable to mechanical integrity failure — the direct result of deferred maintenance and aging infrastructure. The U.S. average refinery is already 10 years past the point where this risk curve turns sharply upward.
Source: Marsh — 100 Largest Losses in Hydrocarbon History (2020)

The issue becomes clear once you know the average age of a refinery in the United States is 40 years old. The average age of the largest refineries—which account for most hydrocarbon production—is far older.

Here’s when the seven largest refineries in Texas and Louisiana were built:

Texas & Louisiana — largest refineries
Built for a Different Era
The last U.S. refinery with significant downstream capacity came online in 1977. Most large-scale oil and gas production in Texas and Louisiana happens at facilities between 81 and 124 years old.
Marathon — Garyville, LA
1976 — 50 yrs old
Last major U.S. refinery built; the only one post-1950
Citgo — Lake Charles, LA
1944 — 82 yrs old
Built during World War II
America’s largest refinery by capacity
ExxonMobil — Baytown, TX
1920 — 106 yrs old
Built before commercial aviation existed
1909 — 117 yrs old
Predates the Model T Ford by one year
ExxonMobil — Beaumont, TX
1903 — 123 yrs old
The same year the Wright Brothers flew at Kitty Hawk
Motiva — Port Arthur, TX
1902 — 124 yrs old
The oldest and among the largest — built before the first World War
Of the seven largest refineries in Texas and Louisiana, only two were built after the start of World War II. The other five predate it — operating with infrastructure designed before modern safety standards, modern materials science, or modern process controls existed.
Source: U.S. Energy Information Administration; Arnold & Itkin research

The EIA reports that the last refinery with “significant downstream unit capacity”—the Marathon facility in Garyville, LA—came online in 1977, which means most large-scale oil-and-gas production in Texas and Louisiana happens at refineries between 81 and 124 years old. Of all the plants listed above, only two were built after the beginning of the second World War.

The Hidden Scars: Human Consequences

Most of these incidents inflict more than just structural damage—they result in life-altering injuries with lifelong psychological, physical, and social consequences. Burns can often leave victims jobless, isolated from family and friends, and unable to enjoy life as they once did. Companies that neglect maintenance not only jeopardize facilities but also make it more likely for thousands of workers to experience catastrophic injuries, such as full-thickness burns, loss of hearing or vision, loss of a limb, and more.

The solution to these issues is simple: scheduled inspection and maintenance would ensure the facilities’ mechanical integrity. Unfortunately, refineries find reasons to defer much-needed maintenance, whether riding high on profit margins or scraping by during lean times. High profits lead to an “if it’s not broken, don’t fix it” attitude, while low profits present maintenance as an unjustifiable cost. Both scenarios set the stage for the inevitability of mechanical failures, thereby exponentially increasing the risk of incidents.

Only Money Talks

For refineries to consider substantial investments in maintenance and safety, the cost of inaction must outweigh the benefits of the status quo. Significant civil judgments against big players in the industry can tip the scales. As long as failing to invest in safety remains cost-effective, nothing will change.

The tide can only turn if legal consequences make neglect an expensive proposition for companies.

Our analysis shows that aging oil and gas refineries in Texas and Louisiana are ticking time bombs, with the frequency of catastrophic incidents escalating at an alarming rate. These accidents will persist unless preventive measures are implemented immediately. Legal action that imposes heavy civil penalties can catalyze real, lasting change in the industry.

The time to act is now, or else we gamble with human lives and environmental integrity.

About the Firm

Fires and explosions at aging refineries in Texas and Louisiana have accelerated sharply in recent years, and the workers caught in these incidents face some of the most devastating injuries in any industrial setting: full-thickness burns, amputations, and permanent hearing or vision loss. Arnold & Itkin’s Texas refinery accident attorneys have built a record representing workers harmed when companies defer the maintenance that prevents these disasters, recovering more than $20 billion in verdicts and settlements since 2004. The firm handles plant and refinery cases across Texas, Louisiana, and nationwide, taking on the largest energy companies in the country.

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