it's is ALMOST finished...

The kids have been so wild today that I don't understand what is going on! They will not listen and will not follow directions. Worst of all is that what we usually do to get them quiet is not working. They are blatantly misbehaving! What is a teacher to do when children are like this? We wanted to send them outside and get their wiggles out but because of the rain that wasn't even possible. We let them play in centers and they are being so rowdy and fighting with each other that we had to sit them in a timeout. Is it because of the weather? Is it because the end of the school year is right around the corner for them? What is a teacher supposed to do when kids get this out of control?