National rail is surging on freight the Inland Empire doesn't run on

Citrus Belt Review: For the week ending June 6, the AAR put combined U.S. rail traffic at 521,804 carloads and intermodal units, up 7.8% from a year earlier. The composition matters more than the total. Carloads — the bulk-commodity side, led by grain up 9.2% and metallic ores up 9.1% — rose just 1%. The entire headline gain came from intermodal: 293,728 containers and trailers, up 13.6%. Intermodal is the import-driven side of the ledger, the boxes that move through San Pedro Bay and feed the warehouse economy from Ontario to Moreno Valley.

A surging national intermodal number ought to be good news for the Inland Empire. The corridor's own demand signal says otherwise. CBRE put IE Core industrial vacancy at 7.8% in the first quarter, with negative net absorption of 4.7 million square feet — driven by four separate million-square-foot blocks going dark in a single quarter. Colliers tracked it at 8.1% vacancy and called the quarter the third-weakest for absorption on record across a 660.4-million-square-foot market. The boxes may be moving on the rails nationally, but the corridor that stores their contents is shedding space, not filling it.

The reconciliation is in the timing. Port of Long Beach volumes hit a record near 9.9 million TEUs in 2025, and a chunk of that strength reflected front-loading — importers pulling shipments forward ahead of tariff shifts, a pattern the port's own analysts have warned creates a "mirage" of demand that 2026 volumes won't sustain. A national intermodal print captured mid-2026 can run hot on inventory that was ordered, shipped, and railed months ago, even as the warehouses meant to hold the next wave sit emptier. The AAR number is real. It is also the wrong gauge for the Inland Empire, which doesn't run on grain carloads and can't read its own near-term demand off a national weekly that lumps every commodity together. The corridor's tell is on the warehouse floor, and right now it's pointing down.