I saw something from chip and co on Facebook but they are the only ones who are saying anything and they got their reports from Twitter so not the most reliable things.
WFTV.com (Orlando channel 9) stated there was a fire under one of the floats at the 4:15 show. They evacuated the guests and the fire was out by the time Reedy Creek FD arrived. No injuries were reported. If I could figure out how to post the link, I would.