Original: On Sunday, August 28, Canadian National Railway (CN) suspended all rail traffic on its lines south of McComb, Mississippi (lines owned by its subsidiary Illinois Central Railroad that extend into New Orleans), in anticipation of damage from the hurricane.
Simplified: On Sunday, August 28, Canadian National Railway (CN) stopped all rail traffic on its lines south of McComb, Mississippi, (lines owned by its subsidiary Illinois Central Railroad that extend into New Orleans), expectating damage from the hurricane.