Raging Waves in suburban Yorkville, Illinois’ largest water park, kicked off the season on Sunday, welcoming visitors thrilled to ring in the warmer months. The water park posted an opening day message on social media, urging visitors to come out, saying, “It’s Opening Day at Raging Waves!! Don’t let gray skies keep you away, the sun will be shining today!” Opening day featured special activities, including a DJ, face painters and tattoo artists…