I am not just talking about catastrophic incidents, in that I mean to say the ones that killed people, and devastated the facility it was in. I looked up data with the BSEE, FERC, and PHMSA. There are little leaks of hydrogen that are considered the most minor hazard a several times a year yes. But the amount of incidents when it goes from potential, to actual, are not frequent enough to be rated in times per year. I was considering situations like where it just lit then went out, or created an environment that could suffocate someone, etc. Beyond that, most of these hazards are not from hydrogen, but other materials.

What it boils down to, is that hydrogen is no more dangerous than other chemicals, we commonly use, that can be explosive.