"In case of fire immediately leave the building" or "In case of fire leave the building immediately?

both d ways are correct but 2nd one somehow sounds good what say!!!!!

both are fine

Both means the same, but should be used in different situation and condition. When 'leave' is more important, "In case of fire leave the building immediately" is better. When 'how to leave' is more important, then "In case of fire immediately leave the building"is better.