The Fire Brigade Union are walking out for the second time in a week due to rows over pensions. The government wants firefighters to work until they are 60.
Fire departments across Wales have issued safety warnings in light of bonfire night and are asking people to be careful with fireworks.
Trained auxiliary firefighters will step in to cover duty during the industrial action. The FBU will picket from 06:00 and 08:00 this morning.
More top news
A new service launches in Wales today to get more people involved in dementia research, even if they don't have the condition.
As Welsh-born former Australian PM Julia Gillard speaks at the Senedd on women's rights, we take a look at some important female figures.
Barry-born Julia Gillard is delivering a lecture at the Senedd today, where she will discuss barriers women face in the public sphere.