The Ministry of Agricultural and Irrigation says it is planning to re-cultivate paddy fields damaged by Cyclone Komen.
Up to July 30, incessant rain has left 395,700 acres of farmland under water.
The ministry is planning to distribute fast-growing rice strains to farmers and use its tractors to clear damage and plough land after the water recedes.
Around 116,500 acres is flooded in Sagaing Region; 109,400 acres in Bago Region; 26,560 in Kachin State; 10,060 in Magway Region; 48,320 in Rakhine State; 17,540 in Yangon Region and 53,340 in Ayeyawady Region.
Sagaing Region tops the list of areas of damaged crops with 23,100 acres, followed by Bago with 1,330 acres.
The authorities are warning lower Myanmar to prepare for floods as the water heads towards the Bay of Bengal.
Quick-growing paddy strains are to be used for rapid re-cultivation in the damaged farmland.