Her health is being managed hourly, much less daily. Watch the video again. None of her secret service agents or handlers were surprised. One agent strides in from off screen before she even starts falling to block the video.
Sean, did you not notice that everyone in the video is used to this happening? This was not the first time.
And it wasn't that hot. Reports are it was under 80 degrees. So around 25 celsius. She is not well, and it's been obvious for weeks.