Interesting! I probably means "What were the reasons that could explain the situation today?" How did we get here? = how did we reach this point or this situation? Today = The situation as it looks today.

Here's my guess: How we reached this point. Or, in the context you came across this expression: How on earth did we survive (the hurricane)? How we got here I will never know. To get somewhere can mean reach a destination or achieve something. Now we're getting somewhere = getting a result