This is the 3183rd most frequent Catalan word.
ratxa
A "ratxa" in Catalan means a gust, streak, or spell (such as of wind, luck, or activity).
Here, 'ratxa' refers to a brief burst or gust, specifically of wind.
La ratxa de vent va fer caure les fulles dels arbres.
The gust of wind caused the leaves of the trees to fall.
In this sentence, 'ratxa' is used metaphorically to describe a series of successes or positive events.
L'equip de futbol està en una bona ratxa de victòries.
The football team is on a good streak of victories.
Here, 'ratxa' describes a sequence of occurrences, in this case, of unfortunate situations.