Water at the Kenering dam, 30 kilometres from Kuala Kangsar hit its highest level in a decade, prompting authorities to release the water avoid overflowing.
Gerik district deputy police chief Jamalani Mohd Isa said water has been released in stages since Dec 22.
"This has not happened for 10 years," he said when contacted.
Water from the dam will be released until dam operator Tenaga Nasional Bhd deems water levels to be safe.
He cannot confirm evacuations, but Malaysiakini understands that Gerik folk were warned of possible flooding due to heavy rains during the dam release.
TNB is releasing water from four dams, Bernama reported.
They are Bersia, Kenering and Chenderoh on Sungai Perak and the Kenyir dam on Sungai Kenyir, Terengganu.
More 100 families consisting of 435 people from the Hulu Perak and Kuala Kangsar district have been evacuated, the National Security Council (MKN) told Utusan Malaysia.
About 60,000 people have been evacuated in east coast states as flood worsens.
Read more here: http://www.malaysiakini.com/news/284468