Ask HN: Can you still achieve FIRE if you start planning at 40?

As a hypothetical, imagine that you are 40, and you are strapped for cash. No retirement funds or other accounts other than a checking account, and you are collecting unemployment. Your first priority may be to get a full-time job for a more stable source of income. At that age, it still doable to retire early with financial independence in 10-15 years? And do you think there is an event horizon where FIRE is no longer achievable?