According to the NSR website, every hiker should be ready to stay out overnight in a survival situation. They also recommend to carry extra clothing, survival gear, and be mentally prepared to endure the night out.
The rescue crew is also reminding hikers that on the North Shore, going downhill often leads to dangerous natural drainages. These drainages have the common features of very thick bush, steep cliffs, and waterfalls.
On the right here, you can read more about what is essential to carry while out on a hike, and also some safety tips from the North Shore Search and Rescue Team.