Rainfall on 12 and 13 November 1999 was exceptional not only in terms of its extent but also by its length and intensity.
It spread to the Tarn, Pyrénées Orientales, Hérault and especially the Aude, where cumulative rainfall in 24 hours reached colossal proportions (622 mm at Lézignan, in Corbières).
The results of these downpours on the Department were dramatic. 35 people died, 438 municipalities were flooded, road and rail networks were destroyed while drinking water, electricity and telephone services were down for days.