This is the 10892nd most frequent Catalan word.
ràfega
A "ràfega" is a "gust" or "burst" of wind.
Here, 'ràfega' is used to refer to a quick, strong burst, specifically of wind.
Una ràfega de vent va moure la vela.
A gust of wind moved the sail.
'Ràfega' describes a quick succession or overview, in this case, of news headlines.
Vaig llegir una ràfega de titulars de notícies.
I read a series of news headlines.
In this sentence, 'ràfega' refers to a sudden burst or flash of lights.