What is the fine-grained topic of the following text: Saw Bway Doh, an official from the Karen Refugee Committee’s (KRC) Mae Sariang office explained to Karen News that the flash flooding and landslide took place at Section 1 of Mae La Oon refugee camp in the early hours on September 16, 2018. Only return the topic.
Flash flooding and landslide at Mae La Oon refugee camp in September 2018.