Another rainy wet performance, but this time IU almost fell

Seriously, when are these people gonna start being concerned about the artists' safety? It looks all fun and sometimes even sexy when they perform in the rain, but even through KARA's recent rainy performance I just kept thinking how bad they could fall. Is it so hard to take some sort of measures to keep the stage dry if it rains? Tents? There must be something they can do to protect the performers.
She slips on the wet stage at ~4:43
!