This is the 1882nd most frequent Russian word.
пожаров
"Пожаров" is the genitive plural form of "пожар," meaning "of fires."
The word 'пожаров' is the genitive plural form of the noun 'пожар' (fire) and here it's used as part of a comparison to indicate an increase in the number of fires.
Пожаров в этом году было больше, чем в прошлом.
There were more fires this year than last year.
In this sentence, 'пожаров' is used in the genitive plural as part of the phrase 'предотвращения пожаров' (prevention of fires), denoting what is being prevented.
На заседании обсуждалась программа предотвращения пожаров.
The meeting discussed a program for preventing fires.
Here, 'пожаров' in genitive plural form specifies whose consequences ('последствия') are being referred to, indicating possession or origin.