MEMORANDUM *

The Association of Unit Owners of Nes-tani-A Grecian Villa (the “Association”) appeals the district court’s grant of summary judgment to State Farm Fire & Casualty Insurance Company (“State Farm”) in a dispute over coverage under the Collapse Endorsement to the Association’s ea-sualty insurance policy issued by State Farm. We have jurisdiction under 28 U.S.C. § 1291, and we affirm.

1. The Association bears the burden of showing that a “collapse” occurring during the policy period caused its loss. See Lewis v. Aetna Ins. Co., 264 Or. 314, 505 P.2d 914, 916 (1973). Given the ongoing nature of the property damage and the expert testimony that there’s no way to determine when the damage happened, no rational trier of fact could conclude that the Association has made such a showing. See T.W. Elec. Serv., Inc. v. Pac. Elec. Contractors Ass’n, 809 F.2d 626, 631 (9th Cir. 1987).

2. The district court correctly concluded that no “entire collapse” of “any part of a building” occurred. The language in the Collapse Endorsement was drafted specifically to limit coverage to actual collapses. Sexton v. State Farm Fire & Cas. Co., 2003 WL 23274849, at *2, 2003 Del.Super. LEXIS 430, at *5-6 (Dec. 30, 2003); see also Assurance Co. of Am. v. Wall & Assocs. LLC of Olympia, 379 F.3d 557, 563 (9th Cir. 2004). Damage of the type seen here is more properly treated as imminent collapse or as structural impairment. E.g., id. at 558 (in which gypsum sheathing had “turned to mush”); Schray v. Fireman’s Fund Ins. Co., 402 F.Supp.2d 1212, 1215 (D.Or. 2005) (where property had “significant rot and decay of some structural members”).

3. Because we affirm on the above bases, we need not decide whether the district court erred in its interpretation of the term “sudden.”

AFFIRMED.