Prime Minister Yingluck Shinawatra on Friday issued the disaster warning for Bangkok, consolidating power for flood control and drainage.
Yingluck invoked the 2007 Disaster Prevention and Mitigation Act to oversee flood control in lieu of declaring the state of emergency.
Under her instruction, the topmost priority for flood control is to speed up the drainage of run-off into the sea via East Bangkok.
The government is to coordinate with the Bangkok Metropolitan Administration to operate all sluice gates in the capital in order to rein in the water flow.
The armed forces would be in charge of maintaining and defending the royal-initated dykes and levees.
The military would also be responsible for protecting key installations, including the Grand Palace, Siriraj Hospital, the tap water system, Suvarnabhumi and Don Mueang airports.
The Transport Ministry would take charge of ensuring road traffic in the capital.
Relevant agencies would map out plans for evacuation and setting up shelters.