This is the 10036th most frequent Catalan word.
ocasionada
"Caused" or "brought about."
Here, 'ocasionada' indicates the cause or reason for the flood (a passive construction).
La inundació fou ocasionada per fortes pluges.
The flood was caused by heavy rains.
In this case, 'ocasionada' explains the reason behind the delay.
El retard ha estat ocasionat per problemes a la carretera.
The delay was caused by road problems.
'Ocasionada' describes the origin of the significant damages.