Urgent issue for whom? If there is some org relying on something you maintain voluntarily, in your free time, that seems like a "Poor planning on your part does not constitute an emergency on mine"-type situation to me.
At the risk of sounding like a poor man's John Galt: If you wouldn't like to get out of bed at 5am to work without getting compensated, then you should just not do that.
Urgent issue for whom? If there is some org relying on something you maintain voluntarily, in your free time, that seems like a "Poor planning on your part does not constitute an emergency on mine"-type situation to me.
At the risk of sounding like a poor man's John Galt: If you wouldn't like to get out of bed at 5am to work without getting compensated, then you should just not do that.