The U.S. government will not abandon any local resident, regardless of his or her immigration status.
Free Water
If a person is thirsty but doesn't have a dime, he can ask for water for free at any nearby café.
Not only will he be given water in a disposable glass, but he will even be offered to put ice in it.
Free food
Even if you do not have money, starving to death in the country of consumption is not afraid of you. There are several ways to get free food:
going to food banks (special centers for low-income people where you can get food);
going to food distribution points for the homeless (here food is cooked on the spot and given to those in need in plates);
eat in supermarkets and grocery stores with food samples (many stores and cafes conduct tastings of various products, which are completely free. Full meals can be tasted at American buffets; you just need to take a small plate and pour any sauce or soup "for tasting" in it).
Free showers
In the U.S. there are points for truckers and drivers where you can not only wash yourself, but also rest in a specially designated room. Or you can buy a subscription to a fitness club and take a shower there (in the States you can find a subscription for $10 a month).
Many fitness clubs also have a sauna and swimming pool.
As we see in America you can get a lot for free, but no one will forgive you if you do not pay utility bills. That's why there are trusted and reliable firms that will create your utility bill go now.