A hypercane is an extreme type of a tropical cyclone which forms in extremely warm waters (around 50°C/122°F). This temperature increase is usually caused by super-volcanic eruptions, extensive global warming or a large comet or asteroid impact. This storm has a recorded wind speed of 247 mph (397 km/h) (if Category 7 is not included within the Saffir-Simpson scale) or approximately 500 mph (801 km/h). Hypercanes cover a large area of land and reach around 19 miles (30 km) into the stratosphere, preventing stratospheric jets or airplanes from getting past. The ocean in which the hypercane formed in stays warm from a few weeks to a few months, allowing the hypercane to survive longer. Also, if waters stay warm after the storm dissipates, it will allow more hypercanes to form. If this sort of storm actually impacts land, it causes widespread chaos. A hypercane's winds allow it to form an extremely high storm surge, which floods up to 20 miles (32 km) inland. Hypercanes can have damage of up to around 2 trillion dollars, like what happened in 2776 with Super Hypercane Mu.