Lack of rain has shriveled reservoirs that feed Brazil's hydroelectric generators, forcing power companies to start back-up plants.
"Coming from playing every week in England to a hotter, more humid climate where you're sweating more is obviously going to affect the way you play.
"Sprinting for long periods becomes more difficult and you need to take more breaks to breathe and get a sip of a drink to rehydrate.
"You also feel it after a game because your body has worked harder trying to cool down and you need to allow greater time for your muscles to recover.
"When you are playing in hot and humid conditions you need to place more control on the tempo of the game and ensure you don't burn yourself out in the first half.