Ambulance crews gave out 20k cups of water. I wonder if there was access to water or if it was only for sale by bottle. It's a sad thing that happened, but we really don't know what happened. Hell, I did it, even when I was older. That crush, that energy was because people wanted to see the band perform.
Water always costs at a festival, especially in Australia.
That's not unusual for this time of year, and heatstroke is always a concern. I find it laughable that on their website, Limp Bizkit put a post up about the gig, and made obvious mention about how a gig at the Sydney Entertainment Centre had gone off without injuries - you'd hope it would, as it's a largely seated venue. The support, You Am I, came on and the crowd rushed forward. They were bracing them with road-signs. Soundgarden came on, and the crush got worse.