A major fire is burning at the harbour in Aarøsund, Denmark, with several boats and buildings up in flames. Firefighters are on the scene working to contain the blaze at the waterside location. Police are also present to support the operation and keep order around the site. Authorities have told people to stay away from the area while the emergency response continues. Harbour fires are hazardous for a simple reason: boats often carry fuel, and nearby structures catch quickly. Wind off the water can push flames between vessels moored close together. The extent of the damage and any injuries have not been detailed in early reports. The cause of the fire remains unknown at this stage.