BANGKOK (The Nation/Asia News Network): Residents of Bangkok, Pathum Thani, Nonthaburi, Ayutthaya, Saraburi and Lopburi have been warned of possible flash floods due to overflows from the Pa Sak and Chao Phraya rivers from Saturday as a full Pa Sak Jolasid Dam is about to release an increasing amount of water, the Disaster Prevention and Mitigation Department (DDPM) announced on Wednesday (Aug 24).