USA national team boss Juergen Klinsmann has blamed the weather in Utah as the reason for his side's listless beginning to their CONCACAF Gold Cup win over Cuba on Saturday.
The US conceded to Jose Alfonso in the 36th minute before levelling from the penalty spot through Landon Donovan on the stroke of half-time.
A second-half go-ahead goal from Joe Corona preceded a brace from a rampant Chris Wondolowski to give the side an eventual 4-1 win but Klinsmann felt his players were affected by the weird Sandy weather at the start.
"It was a bit interesting because the rain came, and then suddenly the air was really heavy. We felt it on the bench out there," he said.
"Coming out of the locker room, they were ready; they had good energy. It happens sometimes where the energy isn't there anymore when they start the game, but then you have to work yourself into the game.
"If you have a difficult moment and maybe you feel the air is a bit heavy and you can't breathe as well, you just got to go through it."
The US top Group C with two wins from two outings and a goal difference of eight ahead of Tuesday's clash with second-placed Costa Rica who are also undefeated and yet to concede a goal.