1. What types of emergency situations could rescue workers be in that would make it
difficult for them to get energy to their
electrical devices?

Situations such as:

First, we wonder, who are rescue workers? Basically speaking, a rescue worker is anyone who is trained to bring people out of any harm, danger, or threat that may come their way.

|n such emergency situations, power lines are usually down, and so it may be difficult for them to get the energy needed to power their  electrical devices.

You could find a similar question here;

link

  large-scale natural disasters

Explanation:

The niceties of civilization are generally unavailable over wide areas when they are affected by ...

Such situations often require rescue workers.

come closer and become far apart and become steam/gas