The screams were different than the usual sounds of horseplay that Phil and Jennifer Geertsema often hear from the swimming pool at their Plymouth apartment building.
They moved toward the screen door and heard a frantic voice yelling, "Help! Help! My sister!'" Jennifer Geertsema recalled.
They raced to the pool.
But in just a few minutes Monday, despite heroic efforts, two more victims were added to Minnesota's unusually deadly summer in the water.
So far this year, 34 drownings have been recorded by the Department of Natural Resources, up from 21 at the same time last year. It's also up from 26 in 2009 and 27 in 2008.
Hennepin County recorded eight drownings in July, the most in 10 years. There have been 15 so far this summer, compared with just six in all of last year. County officials called a press conference Tuesday to plead for greater awareness of swimming safety practices.
"Water is extremely unforgiving," said Maj. Jeff Storms of the Hennepin County Sheriff's Department. "A drowning occurs very quickly. You may read one page of your book and someone could be under water."
As the Geertsemas raced to the pool at Lancaster Village Apartments in Plymouth, the apartment manager, standing at the pool gate, waved them over.