Cascade Water Alliance CEO Chuck Clarke announced Thursday that the Seattle water system’s outlook has been changed from good to fair.

Seattle Public Utilities supplies water to the Alliance, which in turn serves the cities of Bellevue, Redmond, Kirkland, Issaquah and Tukwila, as well as the Sammamish Plateau and Skyway water and sewer districts.

The downgrade in the water supply was caused by several factors, including the hottest June in the Seattle area’s recorded history, accompanying higher-than-average water consumption and low stream flows into water reservoirs, according to information from Seattle Public Utilities. The agency makes use of both the Cedar River and South Fork Tolt River watersheds, which recorded zero inches of both rain and precipitation in the week preceding July 4.

Seattle Public Utilities is making adjustments to maximize water supply, but water users are being asked to voluntarily monitor their use.

“We are asking residents to continue to use water wisely,” Clarke said in a press release. “There is still water for consumption adequate for use until the rain returns in the fall. But in the meantime, everyone should continue their strong ethic of being careful with this resource.”

The Alliance provides conservation tips on its Water Reliability web page.

Seattle Public Utilities posts the status of its water supply on its home page.