How do you quickly spot raids in Imperial Age?

I have a recurring problem where I am very slow to react to raids during imperial age because of the sheer number or “being attacked” notifications. I typically do well in dark-castle ages in responding quickly to aggression, but when I make mistakes in Imperial, it tends to be very costly. I was winning a game tonight and the opponent snuck just a few light cavalry into my main eco (with several TCs I could’ve garrisoned inside) while I was aggressively pushing him, and I lost 40-50 villagers before I even realized what was happening.

So, what do you do in imperial age to respond quickly to raids when the “being attacked” sound is constantly going off? Thanks in advance!