Now that we always have a business class computing device on our person, work is expected even during natural disasters or sickness. You can’t simple call in “sick” or call in “earthquake”. If you have battery power left you have to qualify it as “too sick to actually work” rather than too sick to come spread disease at the office.
We can never escape work. We keep up with work regularly just to be sure everything is going well in our absence. When working for a global company, we can check in and though not rewarded we “check in” to be sure questions are answered and all stays on track.
Well, “not rewarded” may be too strong. We are not punished by a deluge of email if we maintain regular communication.