In Australia we've been having a lot of fires in rubbish trucks, people keep throwing batteries in the regular recycle bins and when the trunk collects a few bins and then compresses his load they catch fire.
In general there's only two reasons they'll catch fire. Overcharging is a real problem, that will often set them off. The other reason is damage. The most common type of damage can't be seen by the naked eye, if there's a dry solder joint (poorly soldered, weak connection) between two of the individual little batteries in the battery pack and you've gone over one too many rough bumps then there's a danger of that solder joint getting hot during charging.
Australia just introduced a whole new raft of legislation about safety standards and testing of batteries that almost instantly stopped a few of the cheaper imports, now we have to wait and see if it makes much difference. There's not been many car fires here and as far as I know they were all involved in accidents, not many bike fires either, it seems to be mostly the scooters that are the problem and that's probably partly to do with cheap manufacturing.
Had a fair few in the UK like that, though I heard of a new EV bin lorry going up. Not sure if this was due to what was being squashed inside or the EV truck itself as I only briefly saw the one who brought it to the fore. On our news, we don't get most of the EV fire articles, as we usually get them about the UK fires from news abroad about the UK. There are gagging orders on UK press, as they are not allowed to report any negative aspect on certain things such as covid preventers etc. I know because I have indirect connections with the press so I hear of quite a number of hushed up things. We can't usually directly watch other countries news about the UK, but we do get people who are putting it up on YouTube who show the news for us to see before they get taken down. (We no longer have a free press like we once had, but at least we can see things on sites like YouTube before the athorities have them removed).
It is concerning how many people blindly accept what they see without questioning them. The problem today in the UK is now, not so much what they are hiding and preventing us from finding out, but rather that we then become over skeptical and ignore anything we see on news channels such as the BBC, and then end up honestly surprised and shocked when we find the odd news article actually turns out to be true! (Even GB news has been taken over and controlled by the UK government so what is being aired today we sort of ignore, when a year ago one could rely on it as it was).
I remember meeting a gentleman on the train who was one of those rich men who did not look rich, but one knew he was one who controlled things at an upper level, and we became friendly and had a lovely chat. He warned me that if I wanted truth, not to look at the TV as he said it was used for brainwashing, and he told me which newspapers to read that the people like him used to share what was going on with others who needed to know. I will not mention which ones as it is important to keep these safe.
But it does show how we need to find other sources for our information. I remember a person who I am in touch with who is from the USA and when I asked her what was going on in the USA about a certain event on our news, she checked and found nothing about it. So I tried sharing the news link so she could watch it and there was a block on it being viewed in the USA. We regularly have USA news about the UK blocked for us to see here in the UK. One wonders what is going on?