Dyfed Powys Police say they have had reports from all over west Wales about flooding on roads and in houses.
A spokesperson for the police said they had been 'inundated' with received calls from areas including Aberystwyth, Carmarthen and Pembrokeshire.
He advised people to stay inside and avoid driving due to flood water gathering on both minor and major roads.
Traffic Wales says no roads as yet are closed due to the flooding. To check for updates visit the Traffic Wales website.