during carnival, temperature in rio can reach 40 degrees celsius (104 fahrenheit), with high level of humidity - and the costumes are often heavy, and not always light or comfortable.

furthermore, in addition to the 60 minutes required by the parade, participants must stand ready to parade for at least another hour before entering the sambódromo.

therefore, it is important to take part when well rested, also keeping in mind that there would be no way to stop or use restrooms during the parade.