Peter the apostle started the list, showing the people of his day that even through lots of trouble, God knew how to take care of his own.
- In the days of Noah, the whole world went down. But God saved Noah.
- In the days of Sodom, the whole city went down. But God saved Lot. (2 Peter 2:5-7)
If it's our turn now, our part is to show the hope that we have: that God is faithful; and to be ready to answer the reason for our hope: Jesus' resurrection from the dead. I think that, even if things don't get any worse, it's time for us to start living out our trust in God more boldly. Times are dark enough already, don't you think? No need to wait for worse. That is one way we can be a light in dark times.
Where to start? Peter said to cast our anxieties on God, because he cares for us (1 Peter 5:7). That sounds like a good place to start.
I should mention: Noah had to build an ark, and Lot had to get out of town. So trusting God goes hand-in-hand with taking action.