It is likely that 100 year events, calculated on the basis of historical data are overly optimistic. That is, these events will occur with higher frequency. H

It is likely that 100 year events, calculated on the basis of historical data are overly optimistic. That is, these events will occur with higher frequency. However, "every year"? The only way to make that a correct statement is to say that there is at least one 100 year event (fire flood earthquake viral outbreak, etc.) happening in each year globally. But that has essentially always been true. "100 year event" really only has any meaning when talking about a specific event: e.g., category V hurricane landing within 50 miles of Houston.