HILO, Hawai'i — Big Island Mayor Harry Kim will undergo heart bypass surgery tomorrow after suffering a heart attack on Thursday, the county announced.

His condition is stable and he is resting comfortably, according to Hawai'i County managing director Dixie Kaetsu, who is acting mayor while Kim is off island. The bypass surgery will be done at The Queen's Medical Center in Honolulu.

Kaetsu said Kim is grateful for the outpouring of concern and good wishes.

Kim, 69, was working at county Civil Defense headquarters when he began feeling ill Thursday morning, and went to the Central Fire Station to be checked out. From the fire station he was taken to Hilo Medical Center, and then airlifted to The Queen's Medical Center.

Kim suffered two previous heart attacks, one at home on Aug. 10, and another at Civil Defense headquarters in May 2005.

Kim has been mayor since 2000 and was county Civil Defense administrator from 1976 to 2000.