A spokesman at the Pahang police headquarters said the four districts were Rompin, Kuantan, Pekan and Maran.
"In Rompin 2,595 victims from 23 kampungs have been placed in six centres," he said when contacted.
He said in Pekan, six kampungs were inundated, forcing 341 people to move to the centres, while in Kuantan, 23 kampungs were affected, causing 1,824 victims to 23 centres.
In Maran, nine kampungs were hit, resulting in 633 victims having to take shelter in seven relief centres.
The situation is expected to worsen further following incessant rain in the past two days.
The spokesman also said that the Sungai Charu bridge at KM28 Jalan Sungai Lembing-Kuantan was closed to all traffic after the water level rose to nearly one meter at the stretch. - Bernama