We just lost power here at work. A heavy storm made things dark for about 15 minutes.
The facility designers did not think to add emergency lighting in the bathrooms and some ladies got stuck.
I had to go, too. The bathroom was dark and I had no flashlight. What could I do? No matches or open flames are allowed inside. Where could I get light?
The display on my cellphone provides enough light to see to do a few quick things like find a key, locate a door in an unlit room, or aim at a urinal and not miss. I am sure those ladies didn't think of other items that might produce light, like a pager.
Fortunately, someone did have a flashlight.
Unfortunately, all the toilets and sinks are "touchless" electronic type. No washing or flushing allowed! But there is hand sanitizer available.
So much depends on electricity. One thing I do for my house is make sure I have an old-style analog phone. If the power goes out, my cell might not work and the wireless handsets certainly won't.