It's not causing famine that looks dramatic on the TV. It is causing slow cronic undernorishment which is killing the poor. If you live on a very desperate diet and you get sick then you will lose the fight for life.It's not caused starvation to the point of famine but in countries such as Haiti rising prices have caused food riots where people can not afford to eat.
The additional effect of having no resources for anything other than food will stop you getting medicine or decent shelter. The prospect of having any capitol to improve the ecconomy also disapear.