SiagaBanjir+ is a Twitter-based-crowdsource platform to gather information about flood happening in Jakarta and place those reports into an interactive map. This product is meant to help preparedness of Jakarta citizens in predicted upcoming flood season. Data taken from BPBD DKI Jakarta stated that during January-February 2014 there was 1M+ citizens who was affected by the flood. Besides, as much as 250k+ people were also evacuated. Using SiagaBanjir+, users can share the condition of flood in their surroundings by simply send a geolocation-enabled tweet using #siagabanjir hashtag — pics can be included, too. The service will be totally FREE.