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BMKG warns of extreme heat in southern Indonesia until year-end

The prolonged high temperatures are driven primarily by intensified solar radiation over southern Indonesia, particularly Sumatra, Java and Bali.

Gembong Hanung (The Jakarta Post)
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Thu, October 16, 2025 Published on Oct. 15, 2025 Published on 2025-10-15T18:43:54+07:00

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A Jakarta resident uses an umbrella during scorching weather on Oct. 15 at the Hotel Indonesia traffic circle. A Jakarta resident uses an umbrella during scorching weather on Oct. 15 at the Hotel Indonesia traffic circle. (Antara/Sulthony Hasanuddin)

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outhern Indonesia is expected to experience extreme heat until the end of the year, as both minimal cloud cover over the islands and the ongoing pancaroba (the transitional period between the dry and rainy seasons) allow for intense solar radiation to directly heat the land, authorities warned.

The Meteorology, Climatology and Geophysics Agency (BMKG) has subsequently urged the public to limit outdoor activities to reduce health risks from prolonged heat exposure.

Between Oct. 13 and 14, BMKG recorded daytime temperatures ranging from 27 to 35 degrees Celsius in several major urban centers, including Jakarta, Surabaya, East Java, Palembang, South Sumatra, Semarang, Central Java and Denpasar, Bali. The hottest reading during this period was recorded in South Tangerang, Banten, surpassing 37 degrees Celsius.

Jakarta residents have been particularly affected by soaring daytime temperatures, with highs reaching 35 degrees Celsius, approximately three degrees above the city’s average for this time of year. The situation is compounded by worsening air quality in the capital, making outdoor activity more taxing.

BMKG meteorology deputy Guswanto told The Jakarta Post on Wednesday that extreme heat is expected to continue until December or early 2026.

“We urge the public to minimize heavy physical activities outdoors, particularly for the elderly and children,” he said.

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BMKG warns of extreme heat in southern Indonesia until year-end

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  • Palmerat Barat No. 142-143
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