text:  <unk> , Manila is hit with 6 to 7 <unk> creating floods . In 2009 , Typhoon <unk> struck Philippines . In the aftermath of Typhoon <unk> , the lack of infrastructure led to one of the worst <unk> in the Philippines and creating a significant amount of pollution . Following the aftermath of Typhoon <unk> , the city began to dredge its rivers and improve its drainage network . The <unk> River <unk> Commission is in charge of cleaning up the <unk> River and tributaries for transportation , recreation and tourism purposes . <unk> efforts have resulted in the creation of parks along the riverside , along with <unk> pollution controls . 
  