Flares

Flares are dangerous. When the planet circles the sun, it goes in an oval shape, and gets too close. And causes Flares. Flares will burn you, and you could considor yourself toast. You can prevent getting burned by using a Telescope to locate the distance the planet is from the sun. That way you will have time to get away.

Prevention of death
Use a Telescope to name the ammount of time you have to get safely underground. If you have enough time, scram. And if you don't, burn.