Not sure a famine caused by one of the most fucked up governments the world has ever known counts as a natural disaster or not, but it doesn't make those people any less hungry.
Hungry yes, and hopefully they'll figure out that they have had enough and remove the leadership. That is up to them. .
Do you really think a popular uprising among the literally starving and brainwashed people of NK is ever likely?
Nope, Kim Jong Un and his family are looked at as Gods there, and the people have no means to launch a revolution even if they wanted to, if you keep the people starving and barely alive, they cannot fight against you.