Complex sentence: As a result of scheduling availability on the Western Range, the flight was rescheduled for 26 September, and continued efforts in fighting the Canyon Fire caused an indeterminate delay of the flight into October 2016.
Split into simpler sentences: As a result of scheduling availability on the Western Range, the flight was rescheduled for 26 September. Continued efforts in fighting the Canyon Fire caused an indeterminate delay of the launch with a no earlier than date of October 2016.