With that sort of debt, I'd send or take a balloon, or maybe just mail a card depending on the level of the emergency. But I'd do something, which I think is your point.
For a funeral, I'd send flowers regardless, but I don't have to send the biggest arrangement available. I'd also take food for a local funeral, but that's not the custom everywhere. If the funeral was for a relative, I'd pay to travel to it. In that case, I might not send flowers also. I'd travel cheaply and stay with extended family (not the bereaved household) but I'd go.
On the same note, money to relatives back home for Decoration Day -- not optional, and I'd do it if it meant I had to cut way back on my own food.
I'd contribute something to a collection being taken in town for a child needing life-saving healthcare. Keep in mind this "town" is small enough to be sure who really needs it.
I think all of mine fall into this sort of "be a decent person" category. There's just stuff you do unless you're simply incapable.