A miniature heat wave is hitting the Portland area starting Sunday, and officials in Washington and Multnomah counties are urging folks to stay hydrated and keep cool as highs float between the mid- to upper 90s for the next few days.

Jurisdictions in both counties point residents to local libraries and public pools as some of the best places to find relief from the scorching hot temps.

In Portland, the city maintains a list of 24 interactive fountains and splashpads, from Colonel Summers Park on the east end to Grant Park in the northeast quintant and Salmon Springs to the west.

Many of Portland's public pools also have free hours during the week. On Monday, when temperatures are expected to reach 97 degrees, Creston Pool hosts free swim from 1 p.m. to 4 p.m.

Montavilla Pool will have free swim from 1 p.m. to 2:30 p.m. Tuesday, when highs will reach 96 degrees, according to the National Weather Service.

Multnomah County will open a cooling center at its East County Building, 600 N.E. Eighth St. The center will be open from 4 p.m. to 9 p.m. Sunday and again Monday from 5 p.m. to 9 p.m.

The county also maintains an interactive map of its air conditioned community and recreation centers. A series of

In Washington County, officials are pointing residents to activity areas and recreation centers with air conditioning in addition to its local libraries and public pools. The full map is embedded below.

--Eder Campuzano | 503.221.4344

ecampuzano@oregonian.com