Tempered glass scatters across the whole floor, into the tub, and under the vanity. Close the door and keep kids and pets out until it's fully cleaned.
Put on hard-soled shoes and work gloves. Scoop the bigger chunks into a box, then vacuum the fine bits from grout lines, drains, and corners.
Small pieces love to slide toward the drain. Cover it and pick out anything visible so you don't push glass down the pipe.
If it's safe, note the width and height of the door frame or the space where the panel sat. It helps the glazier bring the right tempered glass and hardware.
Tempered shower glass can shatter seemingly out of nowhere. It happens because a tiny chip, a nick on the edge, or stress from a slightly out-of-square frame builds up until the whole panel lets go. Sometimes a door bangs the wall one too many times. It's startling, but the glass is designed to break into small, blunt pieces rather than long shards.
A glazier will look at the hinges, the channel, and how square the opening is, because a frame that's off can crack the next panel too. They'll measure for a new tempered panel cut to fit and check that the hardware is solid. In Monterey's humid coastal bathrooms, hinges and clips can corrode over time, so that gets a look as well, whether you're in Sylvan Park, 12South, or a condo Downtown.
It's not a middle-of-the-night emergency like a broken exterior window, but you'll want it handled quickly so you can use the bathroom without stepping on stray glass. Never try to reuse a panel that's chipped or cracked. Damaged tempered glass is far more likely to shatter again, and it can't simply be trimmed or repaired.
Describe what you're seeing to a real Monterey glazier: call (615) 555-0195 or send the form. Free, no obligation.