Phoenix firefighters have treated 25 people for heat-related issues outside Sen. John McCain's lying in state ceremony at the Arizona State Capitol Wednesday afternoon.

Several thousand people have filed into the capitol building, and thousands more are waiting outside in the 105-degree heat.

Phoenix Fire Department officials said that three of those people were taken to a hospital, but their conditions were not critical.

There are volunteers handing out water to visitors along the line into the building to see McCain's casket.