A state of emergency has been declared in the Indonesian capital of Jakarta due to flooding prompted by heavy rain.
More than 15,000 people have been evacuated and some deaths have been reported.
The Foreign & Commonwealth Office said the British Embassy was closed due to flooding.
“Although air travel has not been disrupted, you should check with your airline or tour operator before departure,” the FCO said. “Delays travelling to and from the airport can be expected and you should allow extra time.”
In a revision of its travel advice, the FCO said: “Flooding may have an impact on the availability of services such as emergency and medical care, telecommunications, transport and food and water supplies.
“Ensure you have adequate supplies of food and bottled water to last several days. You should monitor the media and advice of the local authorities, particularly before travelling, as well as updates to this travel advice.
“Walking and driving in flooded areas can be dangerous due to uncovered drainage ditches that are covered by water.
“If driving is essential, exercise the utmost caution. Inform others of your travel plans, ensure you have sufficient fuel and supplies, and your mobile phone is fully charged.
“Be aware that during flooding there is a risk of contracting waterborne diseases, which remains after the water subsides.”