State National Insurance Company, INC. v. Treadwell et al

On January 23, 2026, a devastating wildfire swept through a residential area in California, destroying the Treadwell family's home. The Treadwells held a homeowners' insurance policy issued by State National Insurance Company, INC. Following their claim, the insurer denied coverage, citing a policy exclusion for loss caused directly or indirectly by "earth movement," including earthquakes. State National alleged that a minor earthquake earlier that day had ruptured a gas line, which sparked the fire, thus placing the loss within the earth movement exclusion. The insurer filed a federal declaratory judgment action seeking a ruling that it had no duty to indemnify. The Treadwells counterclaimed, arguing the efficient proximate cause of their loss was wildfire—a covered peril—and that the insurer's denial constituted bad faith. The case required the court to interpret California's efficient proximate cause doctrine in the context of a multi-cause disaster and to assess the reasonableness of the insurer's claims handling. The litigation drew attention as insurers and policyholders across wildfire-prone states faced similar disputes.

The district court granted partial summary judgment in favor of State National Insurance Company on the coverage issue, finding the earth movement exclusion unambiguous and applicable under the chain of causation presented. However, the court denied summary judgment on the bad faith counterclaim, allowing that claim to proceed to discovery, concluding there were genuine issues of material fact regarding the reasonableness of the insurer's investigation and denial.

Whether the "earth movement" exclusion in the homeowners' policy applies to bar coverage when a wildfire—the immediate destructive force—was allegedly triggered by an earthquake earlier the same day, and whether State National Insurance Company's denial of the claim constituted bad faith under California law.

The ruling reinforced the strict construction of earth movement exclusions in California, even when a covered peril like fire is the immediate cause of loss. It prompted public debate over policy language in natural disaster-prone regions and spurred legislative proposals to mandate clearer disclosures of earthquake-related exclusions. Insurers adjusted underwriting practices, while consumer advocates warned homeowners to scrutinize multi-cause disaster coverage, heightening awareness of the efficient proximate cause doctrine.