ATLANTA — Ryan Zimmerman homered and drove in four runs and Gio Gonzalez scuffled for his sixth straight road victory to help the Washington Nationals beat the Atlanta Braves 8-4 Sunday in 105-degree heat. The temperature rose four degrees from the first pitch to 105 by the middle of the eighth inning. The National Weather Service reported that Atlanta broke an all-time recorded high at 106 on Saturday.