NOPE
Can a solar flare give you a sunburn?
No, solar flares won't give you a sunburn; Earth's atmosphere blocks harmful radiation before it reaches your skin.
Solar flares blast out intense radiation, but Earth's magnetic field and atmosphere act like a giant sunscreen, stopping most of that from reaching us. Sunburns come from UV rays, which are mostly affected by our sun’s regular output, not sudden solar flares. So don't worry about turning into a crispy critter next time the sun sneezes.