The Boiling Lake is located on the island of Dominica. It is the second largest boiling lake in the world. The lake is a flooded fumarole.
Fumaroles are normally associated with active volcanoes. They are vents or openings that are common near areas of volcanic activity.
The fumarole at Boiling Lake is flooded with enough hydrothermal activity that causes the water to steam and boil. The lake collects the water from the surrounding landmarks. The water then seeps through to the bottom where it is trapped below with the hot lava and then heated to boiling point.
Measurements of the water temperature at the lake range from 180 to 197 degrees F. However, the temperature at the center of the lake has never been measured because it is actively boiling at the center. The lake appears like a bubbling cauldron surrounded by a cloud of vapor and it perpetually looks to be in a rolling boil state.
It is dangerous to swim in the Boiling Lake due to the hot temperatures, the harmful gases, and the steam explosions that occur at the lake.
The lake also undergoes unusual activity whereby there have been periods when the water levels have drastically fallen. There are also temperature fluctuations when the lake might get cooler.
Scientists have attempted to explain the rapid filling and draining of the lake along with the temperature changes. They have proposed that local seismic activity may lead to the instability of the lake.
Boiling Lake is located in a desolate area in the Morne Trois Pitons National Park. Visitors and hikers to the lake are warned against swimming in the lake or descending to the water's edge.