Currently the sun is launching some intense solar flares.
Th article I've linked also mentions how a "coronal mass ejection knocked out the power grid in Quebec" in 1989. Some powerful stuff. Thankfully the Earth's magnetic fields protect us rather well from the brunt of the force. But I wondered about those on the International Space Station? How are they protected, if it all? Surely a blackout on the ISS would mean death, so how do they prevent them?