Does anybody knows a way to completely remove all dissasters (flood, plague, eruptions...) from the campaign?

event volcano
frequency 19
winter false
summer false
warning true
min_scale 2
max_scale 5
Maybe choosing frecuency 0? has anyone tryed?
Or could I just remove the whole entry from the descr_disasters.txt?

Since our campaign jump over the winter season, I have use the condition:
winter true
so they only happen in winter and so they do not happen, but it seems it do not work.

Any other idea?
Thank you