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THOUGHT: The search results provide very current and specific information about the viral video incident on January 23, 2026.
Here's a summary of the key findings:
* Event Date: The viral video and the siren sounding occurred on Friday, January 23, 2026, due to heavy rain since Thursday night.
* Location: Pintu Air 10, Neglasari, Kota Tangerang, Banten, on the Cisadane River.
* Reason for Siren: The siren was sounded because the water level of the Cisadane River had risen and entered "Siaga 3" (Alert Level 3) status, according to the standard operational procedure (SOP) for flood warnings.
* Official Statement: Mahdiar, Head of the Tangerang City Regional Disaster Management Agency (BPBD), confirmed that the siren indicates "Siaga 3" and urged the public not to panic. He clarified it's a warning, not a sign of an extreme emergency.
* Meaning of Siaga 3: It means the water level has risen above normal, and while there might be localized genangan (puddles/stagnant water), the situation is not yet critical or immediately endangering. It's a "Waspada" (Watch/Caution) status. It's not the highest alert level; Siaga 2 and Siaga 1 are higher.
* Role of Pintu Air 10: It's a historical Dutch-era structure (built 1927, operated 1930) that functions to regulate water flow in the Cisadane River, provide irrigation, and anticipate floods, especially from upstream (Batu Belah, Bogor) or heavy local rain. It has 10 iron gates.
* Impact: The video caused panic among residents. Heavy rainfall also led to flooding in 12 out of 14 sub-districts in Tangerang City, affecting roads and residential areas, with around 611 families evacuating. Some reports indicate floods up to 2.5 meters in other areas impacting thousands of residents. Jakarta also experienced widespread flooding on the same day.
* Further Action: BPBD encourages residents to remain vigilant, follow official information, and report emergencies. The technical details of water levels for different alert statuses are handled by the Public Works and Spatial Planning Agency (Dinas PUPR). Three out of ten gates were opened to control water flow.
Now I have enough specific details, quotes, and context to construct the in-depth news article following all the user's instructions. I will focus on the hard news lead, historical context, implications for flood management, and public response, while adhering to the strict formatting rules.
I have enough information to write the article now. I don't need further search queries.
