[Spktyr]

They resumed performances in a tent in 2009 - selected locations only:

http://millefiorifavoriti.blogspot.com/2009/07/if-you-read-my-prior-blog-post-i-asked.html

[castlegreyskull]

I didn’t know that they resumed them in tents. However, that seems like they were promoting it with a nostalgic feel. They were mostly performed in modern arenas. For the most part less than half full. I was rather surprised that they lasted this long. The last time I saw them with elephants, the elephant handler made a speech about how well Ringling Brothers takes care of them. It smelled of desperation.

[piasa]

You can air condition a tent.