... wouldn’t call it a collapse, rather the roof fabric ripped. Looking at the video, it sure appeared to me that the structure sagged causing the fabric to rib. In one video, you could see the center scoreboard sagging down before the snow poured onto the field.
Was it a heavy 'wet' snow up in MN?
Please note that it's not the first time it collapsed,
It's collapsed four times before under heavy snow.
It's an air-supported structure, so as soon as the first tears occurred, the air-pressure that holds up the roof escapes, and the roof sags. As it sags, instead of being an arch distributing the weight, it becomes a bowl, concentrating the weight, and the roof material tears dumping the snow. They'll probably have to drain the rest of the snow/meltwater out of the dome before they can even begin to work on fixing it.