Always keep an eye on the phases of the moon while sleeping in oceanside caves no matter what, or just don’t go out of your way to sleep in oceanside caves.
Glossy/Shiny Pavement
There are many ways for black ice to manifest, but usually, when it rains and the ground is a below-freezing temperature, the water will freeze as soon as it hits the asphalt. Black ice is just a colloquial term for “ice that has frozen clear so it’s more difficult to see,” and this phenomenon claims the lives of many annually.