A reader pointed me to a very interesting French book that may be of interest to readers. In Chronique du Climat en Poitou-Charentes Vendee Jean-Luc Audé extracts accounts of climate-related disasters from historical records of this area on the west coast of France.
He starts right back in 567, with the flooding of the Ile de Bouin and takes us quickly on to the droughts - Gaul-wide - in 874 which led to "sterility of the soil, a dearth of bread and of all the fruits of the earth". Then we learn that just a couple of years later "the rivers came in flood and annihilated castles, villages and people everywhere". The litany of climate disasters, which continues right up to the end of the twentieth century, is rather amazing and puts claims of global weirding in their proper context.
It's in French unfortunately for the majority of readers here (the translations above are mine, errors and all), but if you have a smattering of the language it's well worth dipping into. Someone really ought to translate it.
You can get it here.