The D.C. Department of Parks and Recreation on May 26 announced the opening of its pools just in time for a heat wave that blanketed the Mid-Atlantic this week.

The National Weather Service on Monday issued a heat advisory for the Washington and Baltimore areas, saying temperatures on Tuesday would reach the lower to mid-90s, but the heat index could get up to 105. Temperatures were expected to remain in the lower-90s and 80s throughout the week.

City fire and rescue officials reported that 12 people were taken on Monday to hospitals to be treated for heat-related illnesses during the National Memorial Day Parade in Washington. In Baltimore at the NCAA lacrosse national title game, the game-time temperature was 96 degrees and it was even hotter at field level on a sun-scorched afternoon.

Agencies across the region opened cooling centers to provide relief to heat-swamped residents, including public pools—a welcome respite in what may prove to be a scorching summer.

D.C.’s parks and recreation department opened all 17 outdoor pools, five children’s pools and nine spray parks last weekend. Outdoor pools will be open on weekends only until school lets out for the summer, and then all outdoor pools will be open six days a week.

DPR Director Jesus Aguirre said, “I am proud that for the second year in a row, DPR will open all outdoor pool facilities starting Memorial Day Weekend. I want to emphasize that while enjoying aquatic facilities is fun, I ask that youth, parents and guardians obey all pool rules so that everyone can have a safe, enjoyable summer.”

For more information regarding DPR Aquatic Facilities, please visit dpr.dc.gov or call (202) 671-1289 during business hours.

The Associated Press contributed to this story.