The most immediate flashpoint is the tariff calendar. Section 122 tariffs — upheld in effect by the Federal Circuit's June 11 stay of the Court of International Trade's injunction — are set to expire July 24, 2026, and importers have no clarity on what replaces them. The administration has signaled additional Section 301 actions, while companies are simultaneously petitioning for exclusions on imports with no domestic availability. The result is a planning environment where landed costs for Q4 goods cannot be reliably forecast.
The Frontloading Surge
Importers are responding the only way they can: moving cargo early. June import volumes were forecast to hit 2.25 million TEUs, a 14.3% increase year-over-year, representing one of the earliest peak seasons on record. Retailers are frontloading fall inventory to insulate against tariff changes, fuel volatility, and peak season surcharges — a strategy that itself creates congestion risk and pulls forward demand that will be absent later in the year.
The European regulatory layer is compounding friction. The EU's Import Control System 2 (ICS2) Release 3, fully implemented June 1, is hitting peak operational impact in July, creating a stricter documentary barrier for maritime imports into Europe just as transatlantic volumes surge.
Hormuz: Recovered but Not Stable
The Strait of Hormuz — blockaded during the active conflict with Iran earlier in 2026 — remains the year's most significant chokepoint risk. A preliminary U.S.-Iran Memorandum of Understanding has established a temporary ceasefire, but commercial transit recovery has been erratic, swinging between 22 and 70 transits per day. Insurers continue to price the corridor at elevated war-risk premiums, and energy and container flows through the Gulf remain one incident away from renewed disruption.
USMCA Review Adds North American Uncertainty
Layered on top of the tariff cliff is the July review of the United States-Mexico-Canada Agreement, with open questions about whether the agreement remains trilateral. A U.S. withdrawal or fundamental restructuring would strike at the nearshoring strategies many firms adopted precisely to escape trans-Pacific tariff exposure — potentially invalidating a half-decade of supply chain redesign.
For infrastructure and data center supply chains specifically, the compound effect is material: electrical equipment, steel, and cooling components face simultaneous tariff uncertainty, early-season freight congestion, and elevated Gulf transit risk. Parselion recommends stress-testing Q4 procurement against a scenario where Section 122 successor tariffs land higher, not lower.