Opinion
Appellants Twila Prince and David Smith, Jr., appeal from the judgment entered after demurrer was sustained to their complaint against respondent United National Insurance Company (United National). The issue raised in this case is whether an insurance policy’s exclusion for injuries arising out of the use of an automobile precludes coverage for the deaths of two young children who were negligently left in a vehicle on a hot day by their foster mother. The trial court concluded that the exclusion applied, and sustained a demurrer in favor of respondent United National. We agree that the use of the automobile was a predominating cause of — and substantial factor in — the injuries to the children, and that the foster mother’s negligence was not independent from the use of the vehicle. We, therefore, affirm.
FACTUAL AND PROCEDURAL BACKGROUND
The Complaint
Appellants’ complaint against United National was filed in February 2005. Also named as defendants were Fire Insurance Exchange and Mercury Casualty Co. According to the allegations of the complaint, appellants are the natural parents of Dakota Denzel Prince-Smith and Nehemaiha Nate Prince-Smith, who died while dependents of the Los Angeles County foster care system. Leslie Smoot had been appointed their foster mother. Smoot was licensed by Trinity Children and Family Services (Trinity), to act as a foster parent and was co-owner with her husband of A Child’s Place Preschool (Preschool) located in Lancaster, California. In July 2003, Smoot left the two children in her vehicle for more than six hours outside the Preschool, and both died.
*236 Appellants filed suit against the county, Trinity, the Smoots, and the Preschool. American Automobile Insurance Company/Fireman’s Fund entered into a settlement agreement with appellants as one of the insurers for the Smoots and the Preschool, and, among other things, assigned them its right to contribution from United National and the other defendant insurers. Trinity, insured by Western World/Tudor Insurance Company, also settled with appellants and similarly assigned any right to contribution owed them.
The complaint alleged in the first and second causes of action that United National issued a “Foster Parent Liability Policy” to Trinity to cover the acts of foster parents licensed or certified under its authority. The Smoots or Trinity allegedly tendered to United National a wrongful death claim brought by appellants, and United National was allegedly “obligated to contribute towards the defense and settlement of the underlying claim,” but refused to do so. Instead, American Automobile Insurance Company/Fireman’s Fund and Western World/Tudor Insurance Company handled the defense without contribution from respondent. Similar allegations were made with respect to codefendants Fire Insurance Exchange and Mercury Casualty in the third through sixth causes of action.
The Policy
The parties later incorporated by stipulation the policy issued to Trinity by United National. Part A of the policy provided coverage for “bodily injury and property damage.” The following “Exclusion[]” appeared in part A: “This insurance does not apply to; . . . e. ‘Bodily injury’ or ‘property damage’ arising out of the ownership, maintenance, use[ 1 ] or entrustment to others of any aircraft, ‘auto’[ 2 ] or watercraft owned or operated by or rented or loaned to any insured.”
The Demurrer
United National demurred to the complaint, contending that the above-quoted exclusion in its policy precluded coverage for the injury to the children. The trial court sustained the demurrer. In its order, the court
*237
explained that “[t]o find that an injury arose out of the use of a vehicle, the court must find that the use of the vehicle was a ‘predominating cause/substantial factor’ in causing the injury.” (Quoting
American Nat. Property & Casualty Co.
v.
Julie R.
(1999)
The court further concluded that “[t]he use of the vehicle was a substantial factor in the children’s deaths” and “the instrumentality of their deaths.” The court distinguished this court’s decision in Julie R., that a rape occurring in a car was not covered by an automobile policy because the automobile was nothing more than the situs of the rape: “In this case, it cannot be seriously argued that the vehicle was merely the ‘situs’ of Smoot’s negligence. Had she abandoned the children in a house, or under a tree, they would not have died in five hours. They died because of the hot car.”
The court considered whether Smoot’s negligence was independent of the use of the vehicle. “In this case, Smoot’s liability simply cannot be dissociated from the use of the vehicle. Absent the hot car, the children would not have died, and Smoot would not have faced any liability for negligence. Because her liability necessarily arose out of her use of the vehicle — parking it and leaving the children in it — it was not independent of the use of the vehicle.”
Finally, in response to appellants’ contention that “the vehicle use exclusion should not apply at all because the specific intent of the subject policy is to cover the negligent conduct of foster parents toward foster children,” the court stated: “This argument . . . would nullify the vehicle exclusion in the subject policy. [Appellants] offer no authority to support such a result, which would be inconsistent with the basic principles of contract interpretation.”
Judgment was entered in favor of United National, and appellants noticed a timely appeal.
DISCUSSION
I
The sole issue here is whether an insurance policy that excludes from its scope of coverage any bodily injury arising out of the “use” of an “auto” applies to injury to youngsters left in an overheated vehicle after it has come to rest. In the trial court, appellants argued that the exclusion did not apply
*238
because Smoot’s negligence was unrelated to her use of the automobile. In their reply brief, appellants raise for the first time the contention that coverage was provided under part B of the policy which applies to “personal injury liability” and that the automobile exclusion found only in part A — applicable to “bodily injury” — does not apply. An argument raised for the first time in a reply brief need not be addressed. (See
Brown v. Boren
(1999)
Moreover, we note that the term “personal injury” is given a specific definition by the policy that does not include “bodily injury.” It is instead limited to injury arising out of the torts of false arrest, malicious prosecution, wrongful eviction, slander and libel, and invasion of privacy. As none of these torts are involved here, the suggestion that part B provided coverage unaffected by the automobile use exclusion in part A does not assist appellants.
II
The leading authority in the interpretation of automobile use exclusions is
State Farm Mut. Auto. Ins. Co. v. Partridge
(1973)
The court initially noted that “[p]ast California cases have established beyond contention that this language of ‘arising out of the use,’
when utilized in a coverage or insuring clause of an insurance policy,
has [a] broad and comprehensive application, and affords coverage for injuries bearing almost
*239
any causal relation with the vehicle.”
(Partridge, supra,
Later courts have construed the above italicized language to require that “in order for
Partridge
to apply there must be two negligent acts or omissions of the insured, one of which, independently of the excluded cause, renders the insured liable for the resulting injuries.”
(Daggs v. Foremost Ins. Co.
(1983)
A
similar result obtained in
State Farm Fire & Cas. Co. v. Camara
(1976)
Based on this understanding of
Partridge,
courts have found negligence to be automobile-dependent in a variety of situations that did not involve actual operation of the vehicle. In
Safeco Ins. Co.
v.
Gilstrap
(1983)
Other cases have addressed whether a parked vehicle is in use for purposes of coverage or exclusion. These cases make clear that a vehicle need not be moving or even running for injuries to arise out of its use. For example, in
National Indemnity Co. v. Farmers Home Mutual Ins. Co.
(1979)
*241
The interpretation of “use” to include conduct relating to a vehicle at rest has not been limited to cases finding coverage. In
National American Ins. Co. v. Coburn
(1989)
Finally, it is clear that a vehicle need not even have been in operation for injuries to have arisen out of its use. In
United Services Automobile Assn. v. United States Fire Ins. Co.
(1973)
Ill
No California case has resolved coverage issues under the specific facts presented here. The parties have brought to our attention cases from
*242
other jurisdictions involving children left in overheated vehicles.
4
Although non-California cases may be instructive in some instances, the interpretation of the term “use” as it relates to an automobile coverage provision or exclusion is not an issue that can be decided outside the context of applicable in-state precedent. As the authorities discussed above make clear, California courts take an expansive view of the term and are disinclined to find overlapping coverage. (See, e.g.,
Allstate Ins. Co.
v.
Jones, supra,
The California cases most relied on by appellants are
Ohio Casualty Ins. Co. v. Hartford Accident & Indemnity Co.
(1983)
The plaintiff in
Julie R.
was raped by the uninsured driver of a car in which she had been riding as a passenger. She filed a claim against her uninsured motorist insurance provider, contending that her injures arose out of the “use” of the assailant’s automobile. She argued that the assailant “ ‘used’ certain physical aspects of the vehicle to trap her and to consummate the assault.”
(Julie R., supra,
The majority concluded that the “uses” outlined by the plaintiff were insufficient to establish coverage. First, the court held that “the mere fact that a vehicle is the situs of the acts causing injury, or that a vehicle is used for transportation to the scene of a crime,” was insufficient to establish coverage.
(Julie R., supra,
Applying a predominating cause/substantial factor test, the majority in
Julie R.
concluded that the “use of a vehicle as transportation to the scene of an injury does not establish a sufficient causal connection between the ‘use’ and the injury.”
(Julie R., supra,
In a thoughtful dissent, Justice Epstein accepted that the operation of the vehicle “must be a substantial (as opposed to insubstantial) factor in bringing about the injury”; that there should be “no coverage if the role of the vehicle is merely that of ‘furniture’ ”; and that “the mere circumstance that a vehicle is used to transport someone to the site where an injury occurs ... is not enough for coverage.”
(Julie R., supra, 16
Cal.App.4th at pp. 147-148.) He saw no justification, however, for imposing “a predominance requirement,” noting that “[i]n
Partridge,
the court said that the ‘arising out of’ formula ‘has broad and comprehensive application, and affords coverage for injuries bearing almost any causal relation with the vehicle. . . .’ [
Whether the test to be applied is predominating cause/substantial factor or minimal causal connection makes no difference here. The relationship between the use of the automobile and the injury was sufficient to trigger the exclusion. Dakota and Nehemaiha Prince-Smith died when they were left in an overheated vehicle. Unlike rape or assault, which can happen anywhere, the type of rapid onset hyperthermia suffered by the children is particularily likely to occur in a motor vehicle. The combination of a small confined glass and
*245
metal space and a warm sunny day creates an environment in which heat is trapped and hazardous temperatures develop within a startlingly brief period of time. Thus, the vehicle, far from being merely the situs of the injury, was itself “the instrumentality” of it.
(National Indemnity Co. v. Farmers Home Mutual Ins. Co., supra,
Additionally, we perceive no separate and independent acts of negligence, unrelated to the use of the automobile. Unlike the negligence in modifying the gun trigger in
Partridge,
which occurred separate and apart from the defendant’s operation of the vehicle, Smoot’s conduct was integrally connected to the use of the vehicle. She did not merely leave the children unattended; she left them strapped into their car seats in a sweltering vehicle. The situation is more analogous to that in
Allstate Ins. Co.
v.
Jones
(1983)
In short, Smoot’s negligence in leaving the children in the hot vehicle “simply cannot be dissociated from the use of the vehicle.” (National American Ins. Co. v. Coburn, supra, 209 Cal.App.3d at pp. 920-921.) It was her abandonment of them in the vehicle that subjected them to the conditions causing their deaths. Had she left them on a park bench, in a grocery store, or on a neighbor’s porch, they would not have expired from hyperthermia. We agree with the well-reasoned order of the trial court, and affirm the judgment.
*246 DISPOSITION
The judgment is affirmed.
Notes
“Use” expressly included — but was not limited to — “operation and ‘loading or unloading.’ ” “Loading or unloading” was defined elsewhere in the policy as “the handling of property: [¶] a. After it is moved from the place where it is accepted for movement into or onto an . . . ‘auto’; [¶] b. While it is in or on an . . . ‘auto’; or [¶] c. While it is being moved from an — ‘auto’ to the place where it is finally delivered . . . .”
“Auto” was defined generally as “a land motor vehicle or all other motorized land conveyances.”
In a case involving similar circumstances — an insured’s negligent repair of his car’s brakes — the court in
Gonzalez v. St. Paul Mercury Ins. Co.
(1976)
Appellants rely on
Mount Vernon Fire Ins. Co. v. Heaven’s Little Hands Day Care
(2003)
Several cases cited in appellants’ brief illustrate this point. In
United States Fidelity & Guaranty Co. v. State Farm Mutual Ins. Co.
(1982)
