There are a large number of events taht have happened many times in Earth's history and, given the cosmic timelines, will happen again, repeatedly. Some may be preventable with technology (eg asteroid impacts), others less so.
A partial list is: tsunamis, earthquakes, volcanoes, supervolcanoes, flood basalts, asteroid impacts, magnetic field reversals, climate change (eg ice once covered the equator, North America used to be covered in an ice sheet a mile thick not that long ago), particles in the atmosphere blocking the Sun, supernovas, gamma ray bursts, solar flares and coronal mass ejections.
It's kind of amazing we're here at all.