insideevs had a photo of the site with panels blown out into the street.
I worked with hydrogen in my career in aerospace. One thing we tried to avoid was confinement of an area where hydrogen might leak (and it will). Ignition energy of hydrogen in air is very low. Confined, one can transition from deflagration to detonation. The picture shows the storage area inside a fenced area with what appears to be confining panels. The temptation for enclosing an area is to keep John Q. Public away from the system, but then you're confining an area that might lead to an explosion. Detection and ventilation is a must if you're going to confine hydrogen.
I bought the official 2009 Chevrolet Fuel Cell Equinox Owner Manual, and the refueling steps are complex. Hydrogen as a gas is dangerous as most know, but in liquid state is is equally dangerous as it becomes very cold (below -200 F) when it evaporates. It is odorless, colorless (invisible), and if a layperson breathes it in, it is slightly toxic but the cold will freeze the trachea and bronchial tubes and asphyxiate the layperson in seconds. Gasoline and natural gas had additives that gives it a recognizable odor at ambient temperature so we can avoid it.
Pure electricity is only dangerous when there is conductivity between the source and the body (physical contact), and the body must be in the circuit path. That is why if anyone touches just one electrode of a HVDC supply or battery, nothing happens. Manufacturers must follow OSHA regulations, so all wires and conductors carrying over 300 VDC must be insulated and orange colored. Therefore, under normal operating conditions, no layperson driving or riding an EV will be in any danger. and no owner will be harmed even when touching one of the orange conductors under the hood.