There's many questions for this tragic incident. I am a little confused, as I heard on the news that a severe thunderstorm warning
was issued 10 minutes prior to the stage collapse but that some people (don't know if it was meteorologists or maybe the concert crew) weren't expecting the storm for another 20 minutes. As soon as the warning was issued, the people should have evacuated. Actually, as Patrick said, the concert should have been cancelled as a severe thunderstorm watch was issued in plenty of time.
Bottom line is, I hope no one even thinks twice about blaming the meteorologists for this tragic event, because they predicted it and issued a warning prior to the storm's arrival. What more do people need?