Three Of Indonesia's Deadliest Volcanoes Just Went On High Alert — Including Krakatoa

If a volcano's mudflow came down your valley, would it reach your house? Check your address against the hazard maps and walk your route out: https://breakpointstore.net Three of Indonesia's deadliest volcanoes, Anak Krakatau, Merapi and Semeru, are all at Level III (Siaga) at the same time, one step below the country's highest alert. Overnight into Monday, heavy rain on Semeru sent cold lahars down four rivers, and the observation post logged a single flood vibration lasting six hours as embankments burst and bridges went under in East Java, far outside the danger zone. Merapi reaches six years at Level III this week, and Anak Krakatau sits inside a 5 km exclusion zone while officials fight tsunami rumours on both coasts. The rainy season has barely begun, and the question now is what would push any of the three to Level IV. Breakpoint covers the moments when the Earth shifts — earthquakes, eruptions, severe weather, climate events, and the science behind the planet's biggest stories. Every video delivers the headlines, the data, and what comes next in twenty to twenty-five minutes. New videos three to four times a week. CHAPTERS 0:00 Introduction 0:33 Three volcanoes at Level III at once 3:24 Semeru's six-hour lahar overnight 5:43 Roads, bridges and homes hit downstream 8:08 Why rain alone triggers a lahar 10:05 Merapi's six years on alert 12:23 Anak Krakatau's five-kilometer zone 14:29 The 2018 Krakatoa tsunami with no warning 15:52 Merapi 2010 and Semeru 2021 17:14 The rainy season and a viral tsunami claim 18:51 What would push them to Level IV SOURCES Liputan6: Three volcanoes at Siaga, BNPB guidance — https://www.liputan6.com/news/read/83... Rakyat Terkini: BNPB on three Siaga volcanoes — https://www.rakyatterkini.com/2026/11... Garuda TV: Anak Krakatau, Merapi and Semeru — https://garuda.tv/anak-krakatau-merap... MalangTIMES: Semeru lahar cuts Malang–Lumajang route — https://malangtimes.com/baca/33313529... Onenewsjatim: Semeru lahar sweeps away gabions — https://www.onenewsjatim.com/2026/11/... PANTURA7: Overflow bridge cut in Lumajang — https://www.pantura7.com/2026/11/02/b... Radar Jogja: Merapi lava to 1,700 m toward Kali Krasak — https://radarjogja.jawapos.com/sleman... Radar Jogja: Merapi hazards today — https://radarjogja.jawapos.com/sejara... detikNews: Anak Krakatau back to Level III — https://news.detik.com/berita/d-87003... Jawa Pos: BPBD Pandeglang on Anak Krakatau — https://www.jawapos.com/berita-daerah... CNBC Indonesia: The 60-meter tsunami claim — https://www.cnbcindonesia.com/news/20... ESDM: Merapi raised to Siaga, Nov 2020 — https://esdm.go.id/id/media-center/ar... The Jakarta Post: Semeru at highest alert, Nov 2025 — https://www.thejakartapost.com/indone... IMAGE SOURCES Wikimedia Commons: https://commons.wikimedia.org Sentinel-2 cloudless by EOX IT Services (contains modified Copernicus Sentinel data 2016): https://s2maps.eu #semeru #anakkrakatau