Hirschfield and Radov (plaintiffs) incurred water damage to the basement of their home, and brought this action against Continental Casualty Company and CNA Insurance Company (defendants), claiming coverage under the homeowners’ policy issued by the defendants. The trial court granted summary judgment to the defendants, who denied coverage, and plaintiffs appeal.
A grate-covered opening to an underground storm drain is located adjacent to the plaintiffs’ home. After a rainstorm, rainwater flowed or rose from the area of the grate, across the surface, and eventually entered a vent leading into the plaintiffs’ basement. The plaintiffs presented evidence that a blockage in the underground drain caused rainwater, which had previously entered the drain at an upstream location, to be diverted upward through the grate and eventually across the surface area into the basement. The defendants presented evidence that the storm drain had become clogged with debris, and was unable to take rainwater away, so that the water level around the grate rose to a point where the rainwater flowed across the surface into the basement.
The plaintiffs’ policy contains the following coverage:
“ADDITIONAL PROPERTY COVERAGE — Back Up of Sewers or Drains. We cover loss to your real property and tangible personal property caused by water which backs up through sewers or drains except for losses in the section called ‘Property Losses We Do Not Cover.’ ”
The policy also contains the following exclusion:
“PROPERTY LOSSES WE DO NOT COVER — Water damage meaning: Flood, surface water, waves, tidal water, overflow of a body of water or spray from any of these, whether or not driven by wind;”
Plaintiffs contend the trial court erred in granting summary judgment to defendants on the coverage issued because (1) when read as a whole, the policy provisions are ambiguous, and (2) a factual question exists as to whether the water which entered the basement was “drain *655 water” or “surface water” within the policy provisions.
The construction of an insurance contract is a question of law for the court.
Transamerica Ins. Co. v. Thrift Mart, Inc.,
The water which entered the plaintiffs’ basement was “surface water” under the widely accepted definition. See
Aetna Ins. Co. v. Walker,
When read together, the relevant insuring and exclusion provisions of the policy plainly cover damage caused by water which backs up through sewers or drains, except flood and surface waters. Even if the insuring provision for “water which backs up through sewers and drains” might arguably apply to rainwater backing up to the surface through the storm drain, the “surface water” exclusion clearly and explicitly excludes coverage under the present circumstances. “ ‘Exceptions, limitations and exclusions to insuring agreements require a narrow construction on the theory that the insurer, having affirmatively expressed coverage through broad promises, assumes a duty to define any limitations on that coverage in clear and explicit terms.’ ”
Alley v. Great American Ins. Co.,
The policy provided no coverage for the plaintiffs’ claim, and the *656 trial court correctly granted summary judgment in favor of the defendants.
Judgment affirmed.
