 A fire broke out at a water park under construction at one of the Nordic region's biggest amusement parks, sending a huge plume of black smoke drifting over Goatburg, Sweden's second largest city. The footage showed the installation at the Oceana Waterworld in Gothenburg ablaze as flames tore through the structure, sending a huge plume of thick, toxic black smoke trailing into the sky behind snow-covered houses. We know that there are fires in water slides, among other things, but we don't know how it started, firefighter Björn Vanderkaj told Swedish press, adding there was a serious risk of the fire spreading to nearby properties. A public health notice was issued in residents living close by were told to immediately get inside and close all windows and doors in a bid to escape the toxic fumes. The fire prompted a mass evacuation of the area. A nearby hotel and office facilities were evacuated, the park and police said. An explosion sent debris from buildings scattered over the burning water slides. The idea behind Oceana was inspired by the history of Gothenburg, founded in 1621 by King Gustav II Adolf. The city became an important trade place for Sweden.