Chumphon  Province History The southern part of the province was originally a separate province named Lang Suan. It was incorporated into Chumphon in 1932.[1] In November 1989 the typhoon Gay hit the province hard - 529 people were killed, 160,000 became homeless, 7,130 km² of farm land was destroyed. Gay is the only tropical storm on record which reached Thailand with typhoon wind strength.