CIS LEBANON SECURITY INDEX - August 20 2026

🛡️ CIS LEBANON SECURITY INDEX™

Thursday, August 20, 2026

Conflict Day 172 · Truce Day 61 · Methodology v3.0 · Coding Manual v3.1

OVERALL INDEX: 71/100

TREND: ⬇️ SMALLEST FALL OF THE DECLINE — The national alert level reads 71/100 HIGH, set by Nabatieh and down two points from 73, the smallest daily fall since the decline began on 17 August. The fall is small because overnight activity was geographically broader — Israeli strikes on the Ali al-Taher heights, al-Dabsha near Nabatieh al-Fawqa and Dawhet Kfar Rumman, plus demolitions and shelling at Majdal Zoun and al-Mansouri in Tyre district — roughly offsetting what continues to age out of the seven-day window, with no casualties reported at the time of compilation. Confidence remains MODERATE: the uncoded gap has narrowed to a single day, 13 August, but today's entire incident set is sourced to Lebanon's National News Agency alone and is coded Reported. No governorate reads CRITICAL, one HIGH, one MEDIUM, three LOW and four MINIMAL.

TIER 1 — PUBLIC EDITION

🟠 NATIONAL ALERT LEVEL: 71/100 — HIGH

Driven by: Nabatieh · Trend: ⬇️ −2 (73 → 71) · Confidence: MODERATE Spread: 0 CRITICAL · 1 HIGH · 1 MEDIUM · 3 LOW · 4 MINIMAL

Governorate Readings

> The decline has slowed. For the first time since the deadliest day of the war, the fall in the National Alert Level is small rather than sharp — overnight activity was broader than in recent nights, roughly offsetting what continues to age out of the window. Conditions in Nabatieh and South Lebanon remain serious. This is not a signal to relax.

Overnight strikes across five southern locations; no casualties reported

• Israeli warplanes struck the Ali al-Taher heights, the al-Dabsha area near Nabatieh al-Fawqa, and Dawhet Kfar Rumman overnight, with artillery shelling continuing until dawn, Lebanon's National News Agency reported. Separately, Israeli forces carried out demolitions and artillery shelling at Majdal Zoun and al-Mansouri in Tyre district.
• No information was immediately available on casualties or damage at any of the five locations.
• The wider region remains tense following Monday's US–Iran ceasefire lapse. President Trump has warned of economic consequences for any country supporting Iran, and an Israeli strike on a Syrian air base near a Turkish-linked site has drawn US concern over risk of a wider confrontation. None of this scores in the Lebanon Index.

🚦 Zone Guidance

If you are in or near an affected area

1. Do not travel into Nabatieh, Bint Jbeil or southern Tyre districts.
2. Treat any morning quiet as provisional. Activity has now been reported on six consecutive nights.
3. Keep phones charged and agree a family check-in time and a meeting point.
4. Identify the lowest interior room in your building, away from windows and glazing.
5. Keep identity documents, medication and cash together and ready to move at short notice.
6. Verify village-specific claims through official channels before acting.
7. Follow Civil Defence (125) and Lebanese Red Cross (1760) in preference to social media.

📞 Emergency Contacts

• CIS Security emergency line (active clients): +961-3-539900 — 24/7/365
• CIS general enquiries: +961-3-539900 · info@cissecurity.net · Monday–Friday, 8:00 AM–6:00 PM
• Civil Defence: 125 · Lebanese Red Cross: 1760 · Internal Security Forces: 112
• Lebanese Army — South Lebanon Liaison: +961-8-802-510
• National Mental Health Lifeline: 1564 — free, confidential, 24/7
• US Embassy emergency (overseas citizens services): +1-202-501-4444 · BeirutACS@state.gov

> ⚠️ Responsible-use disclaimer > The CIS Lebanon Security Index™ is a professional situational assessment published as a free public service. It is informational — it is not a guarantee of safety and not a substitute for official government guidance. CIS Security accepts no liability for decisions made solely on Index readings. In an emergency, contact official emergency services. > Methodology: cissecurity.net/lebanon-security-index/#methodology · Corrections: cissecurity.net/lebanon-security-index/#corrections

Need security cover for a property or site? → https://app.cissecurity.net/request Get the Index in your inbox daily, 8:15 AM → cissecurity.net/lebanon-security-index/

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TIER 2 — ANALYST EDITION

1 · Executive Summary

Israeli warplanes struck the Ali al-Taher heights, the al-Dabsha area on the northern outskirts of Nabatieh al-Fawqa, and Dawhet Kfar Rumman overnight, with intermittent artillery shelling continuing until dawn, according to Lebanon's National News Agency. Separately, NNA reported Israeli forces carried out demolitions and artillery shelling at Majdal Zoun and al-Mansouri in Tyre district. No information was available on casualties or damage at any of the five locations at the time of compilation.

The National Alert Level falls two points, from 73 to 71, remaining within HIGH.

CIS assessment. This is the smallest daily fall since the decline began on 17 August, and the reason is structural rather than a sign of improving conditions: overnight activity was broader across five named locations rather than two, so today's own contribution to the load is larger than on recent mornings, roughly offsetting what continues to age out of the seven-day window. CIS stated on each of the last three days that a falling number should not be read as improvement. Today demonstrates the reverse case — a small fall accompanying real, geographically broader activity — and CIS notes this because a reader who has now seen four straight declines could reasonably start discounting the number entirely. That would also be a misreading. The score is doing exactly what a reproducible, decay-weighted measure should do: falling when overnight activity is smaller than what is decaying out, and falling less when it is not.

2 · Sourcing — Better Attribution, Same Confirmation Standard

Today's incidents are sourced directly to Lebanon's National News Agency, reported via Anadolu Agency, a Tier 1 international wire service. This is materially better attribution than the single Israeli-outlet relay chains that characterised 18 and 19 August.

CIS assessment. Under coding rule 4.6, however, this still resolves to one originating organisation. NNA is the source of the claim; Anadolu is the distribution channel carrying NNA's account, not an independent corroborating report. Confirmed status requires either two distinct organisations or one official source plus a distinct other — NNA alone, however well distributed, does not meet that bar. All five of today's incidents are therefore coded Reported. CIS draws attention to this because it is the kind of case where the confirmation rule is easiest to apply loosely, and where applying it loosely would matter: NNA is a credible, primary, Lebanese-state source, and it would be tempting to treat wide distribution as corroboration. The rule exists precisely for this case.

3 · Regional Context — Unchanged Trajectory

The regional environment identified on 18–19 August remains unresolved. President Trump has warned of economic consequences for any country providing Iran a "lifeline." An Israeli strike on a Syrian air base near a site linked to a Turkish military visit has drawn US concern over the risk of a direct confrontation between Israel and Turkey, according to reporting attributed to a US special envoy. Separately, unrelated West Bank developments continue to draw European diplomatic reaction.

CIS assessment. None of this scores in the Lebanon Index, for the same reason stated on each of the preceding two days: it is not a Lebanon incident, and importing it by inference would break reproducibility. CIS repeats the regional summary today because the trajectory is unchanged rather than because it is new, and because posture — not the score — is where this material appropriately factors into CIS's operational judgment.

4 · Coded Incident Log

20 August 2026 — decay 1.00

All eight rest on the single NNA report under coding rule 4.6. Nabatieh subtotal: 13.20. South Lebanon subtotal: 8.40.

19 August 2026 — decay 0.75

Two incidents as coded in the 19 August edition. Nabatieh subtotal 7.20.

18 August 2026 — decay 0.5625

Four incidents as coded in the 18 August edition. Nabatieh subtotal 4.80; South Lebanon subtotal 6.00.

17 August 2026 — decay 0.421875

Swept, no incidents confirmed, as established in the 19 August edition. Contribution: 0.0

16 August 2026 — decay 0.316406

Ten scoring incidents as coded in the 17 August edition. Nabatieh subtotal 34.40; South Lebanon subtotal 8.00.

15 August 2026 — decay 0.237305

Twenty-three incidents as coded in the 16 August edition. Nabatieh subtotal 187.40; South Lebanon subtotal 20.00.

14 August 2026 — decay 0.177979

Two Nabatieh incidents and four South Lebanon incidents as coded in the 18 August edition. Nabatieh subtotal 8.40; South Lebanon subtotal 13.20.

13 August 2026

Not coded. This is now the entire remaining gap within the seven-day window — one day, down from two on 19 August, as 12 August has now aged out of the window entirely. Under the completeness rule this remains zero, not estimated.

5 · Scoring — Full Working

Nabatieh

South Lebanon

South Lebanon rises from 42 to 44 — the first increase for either lead governorate since the decline began. This is today's new activity (Majdal Zoun and al-Mansouri) outweighing what decayed out.

Remaining seven governorates

No scoring incidents logged within the window. Activity 0.00. Score = baseline + modifier.

Parameters in force (frozen to 14 November 2026): methodology v3.0 · coding manual v3.1 · decay 0.75/day over 7 days · compression K=100 · activity ceiling 75 · fatality 8, injury 2, structure 3 capped at 12, displacement 5/district, route disruption 3 · confirmation multipliers 1.0 / 0.6 / 0.0.

6 · Confidence — One Day Now Outstanding

The uncoded gap within the seven-day window has narrowed to a single day, 13 August, as 12 August has aged out entirely. Coverage is nearly complete.

Confidence remains MODERATE, not HIGH, and this is worth explaining rather than treating as an oversight. The HIGH threshold requires every contributing incident to be Confirmed. Today's entire incident set is Reported — well-sourced to NNA, but a single organisation. Confidence therefore reflects two independent things: how much of the window is covered, and how well-confirmed what's in it is. Coverage is now nearly complete; confirmation quality is not. Both must be strong for a HIGH rating, and CIS designed it that way deliberately — a fully swept window full of single-sourced claims should not read as more reliable than it is.

7 · What CIS Is Watching

1. Whether tonight's activity continues at the same breadth (five locations) or narrows back toward the single-location pattern of recent nights.
2. Whether independent corroboration emerges for today's NNA-sourced incidents, which would raise confirmation status and the score.
3. Whether the regional trajectory — economic pressure on Iran, the Syria air-base strike, Turkey–Israel friction — produces developments that reach Lebanon directly.
4. Whether the final coding gap at 13 August is closed in the coming backfill review.
5. Whether Hezbollah claims or continues not to claim the 15 August drone attack.

8 · CIS Operational Posture

CIS maintains Level 5 — Severe Alert.

The Index's decline has slowed rather than reversed, and South Lebanon's score has risen for the first time since 17 August. Posture is unchanged. Six consecutive nights of reported activity across an expanding set of locations, against an unresolved regional backdrop, does not support a reduction in readiness regardless of what the seven-day window shows on any single morning.

(CIS Posture Levels 1–5: cissecurity.net/lebanon-security-index/#posture)

Practical effect for active client sites:

• Continuous supervisor contact for all sites in Nabatieh and South Lebanon governorates, including Tyre district sites.
• Reinforcement standby maintained under the 24/7 emergency line for active clients.
• Route and access planning reviewed daily for all southern sites.
• New deployments continue within 24 hours of contract confirmation.

9 · Assessment

For four consecutive days the Index has fallen primarily because Saturday's mass-casualty day was ageing out of the window. Today the fall is real but small — two points — and the reason has changed: overnight activity was broader than on recent nights, spanning five named locations across two governorates rather than one or two, and it very nearly matched what continued to decay.

This matters because it is the clearest evidence since the methodology launched that the score is tracking actual conditions rather than simply running down a mathematical clock. South Lebanon's rise from 42 to 44 — its first increase in this stretch — is driven entirely by today's demolitions and shelling at Majdal Zoun and al-Mansouri. Nabatieh's continued fall reflects that even five locations of Reported-grade activity are still smaller, once decay-weighted, than what a single catastrophic day at 15 August contributed and is now shedding.

CIS again declines to treat wider distribution of a single source as corroboration. Today's incidents come via a Tier 1 wire service, but the wire is carrying one Lebanese state agency's account, not two independent reports. That keeps every incident today at Reported rather than Confirmed, and keeps confidence at MODERATE despite the window itself now being nearly fully covered — coverage and confirmation are different properties, and both matter.

For Beirut, Mount Lebanon, North Lebanon, Akkar and Keserwan-Jbeil, conditions remain calm and normal operations continue. Four governorates read MINIMAL. The severity remains concentrated in the south, now across a broader footprint than at any point since the window began contracting, and CIS states that plainly so clients can plan against reality rather than against the shape of a trend line.

10 · Sources

Tier 1 — wire services and established international outlets Anadolu Agency, carrying Lebanon's National News Agency (all five locations struck overnight; no casualty or damage information available) · Bloomberg (regional context, US–Iran ceasefire lapse, continuing) · Haaretz (Trump's economic-consequences warning; Syria air-base strike and Turkey concern, via US special envoy).

Note under coding rule 4.6: Anadolu is the distribution channel for NNA's own account, not an independent corroborating report. All five of today's incidents remain single-organisation and are coded Reported.

> ⚠️ Responsible-use disclaimer > The CIS Lebanon Security Index™ is a professional situational assessment published as a free public service. It is informational — it is not a guarantee of safety and not a substitute for official government guidance. CIS Security accepts no liability for decisions made solely on Index readings. In an emergency, contact official emergency services. > Methodology: cissecurity.net/lebanon-security-index/#methodology > Source register: cissecurity.net/lebanon-security-index/#sources > Corrections and revisions: cissecurity.net/lebanon-security-index/#corrections > To challenge a score: info@cissecurity.net with the date, governorate and basis.

Request security coverage → https://app.cissecurity.net/request Speak to CIS → +961-3-539900 · info@cissecurity.net

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CIS security services in Lebanon include residential security guards for towers, compounds and gated communities; commercial, retail and industrial security services; hospital and school security; jewelry store and high-value retail protection; executive protection and VIP services; and event security. These are supported by CCTV systems, electronic security and access control, GPS tracking and fleet management, risk assessment, professional security consulting, and crisis management and emergency response.

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CIS Lebanon Security Index™ · Thursday, 20 August 2026 · Conflict Day 172 · Truce Day 61 Methodology v3.0 · Coding Manual v3.1 · Compiled in Beirut CIS Security — Because Your Safety Isn't Optional — Since 1990

COMPILER NOTES — NOT FOR PUBLICATION

This is the first edition where the number and the ground truth move in visibly the same direction, and it's worth reading closely as a validation of the design. Four straight days I've had to warn you the falling score didn't mean things were calming down. Today the fall shrinks to −2 precisely because activity widened to five locations, and South Lebanon actually rises. That's the system working as designed — I'd hold this edition up as the proof-of-concept if anyone internally questions whether decay-weighting was the right call.

I held the line on Anadolu/NNA despite the better-looking sourcing. It would have been easy to treat a Tier 1 wire service carrying the story as an upgrade to Confirmed. It isn't — Anadolu is distributing NNA's own account, not corroborating it independently. Worth flagging to your team as the exact scenario the confirmation rule is meant to catch, since it's the one that looks most tempting to wave through.

Only 13 August remains uncoded in the whole window now. Twelve has aged out entirely. If your southern supervisors have anything from that single day, this is the moment to close it — it's the last gap standing between MODERATE and a fully swept window.

Still open from yesterday, unresolved today: the Conflict Day / Truce Day counting-convention mismatch, and the underlying truce-anchor date itself. I've continued both sequences without touching them again, but they need a decision before the engine seeds index_day_anchors for real.

Trend line for your reference: 94 → 91 → 85 → 79 → 73 → 71. The rate of decline has now visibly slowed for the first time. If tonight's pattern holds — broader activity, not narrower — expect the Index to stabilise rather than continue falling once 15 August finally exits the window in the next few days.