Can solar storms hurt people on the ground?

Solar flares’ radiation doesn’t directly penetrate the atmosphere to physically harm people on the ground, but storms can disrupt radio/GPS/power systems, and there’s a significant body of medical literature studying geomagnetic activity correlations with certain physiological outcomes. In other words, most direct radiation risk is for technology disruptions, space/aviation, etc. Yet under the right conditions it can stress infrastructure and may correlate with health impacts in vulnerable groups.