Despite challenges, pools around the Valley are open for Memorial Day weekend Valley pools still making adjustments due to COVID-19 pandemic Memorial Day marks the official start of summer, and people are heading out to pools, some for the first time since 2019. However, pools are still feeling the lingering effects of the COVID-19 pandemic. TEMPE, Ariz. - It’s a busy Memorial Day weekend for Valley pools, as people make a splash to beat the heat. "What a wonderful way to spend with the family," said Thaia Edgecombe of Phoenix. The Kiwanis Wave Pool in Tempe is one of the many area pools to open up for the Memorial Day weekend, Ssmething the kids especially seem to enjoy.