Authorities in Cilacap District, Central Java, are mounting emergency response measures after overnight moderate-to-heavy rainfall triggered floods and. Idukki/Kottayam: Three were killed while several others were trapped following separate landslides in Idukki and Kottayam districts on Saturday, as incessant heavy rain triggered floods and. Heavy rainfall batters Kerala for another day, triggering floods, landslides and rising river levels; IMD issues alerts across all 14 districts as authorities brace for more rain.