A large water main broke this afternoon, and most of the Oklahoma City's water supply is affected to some degree, officials said.The pipe broke near SE 149 and Douglas Boulevard about 3:15 p.m., utility spokeswoman Debbie Ragan said.Crews are currently working to repair the main, and expect to have water pressure returned by about 6 p.m., she said.The entire south and east sides are affected to some degree because the water supply in those areas comes from Lake Stanley Draper.Read more on NewsOK.com