We've been getting a bunch more traffic in the past few days (possibly because of Bulbapedia being down). We are fine during the day but peak evening traffic tips us over the edge.
I have made a couple of changes which should keep the site responsive (i.e. always loading pages) even if it's a tiny bit slower. So far it's dropped the load a fair bit.
P.S. I am monitoring the situation multiple times a day so we don't need any new threads about this in at least the next week.