Wutai Highway 24 Blocked by Slope Collapse: transport / watch; Haiduan Xiangyang-Lidao Reopened

00:22 Update: Changle Village in Manzhou Added to September 1 Work/Class Suspension

Information time: September 1, 2026, 00:22.

Official sources: Directorate-General of Personnel Administration; Central Weather Administration; Water Resources Agency; Agency of Rural Development and Soil and Water Conservation; Highway Bureau; Forestry and Nature Conservation Agency; and relevant local-government and road-authority notices.

Indigenous areas affected: The Directorate-General of Personnel Administration's 00:08:23 update for September 1 explicitly lists Changle Village in Pingtung County's Manzhou Township as suspending work and classes today. It also lists Shiwen Village in Chunri Township as suspending work and classes today. Changle Village is the new threshold-level change in this scan. Changle and Shiwen are both `work-school / watch`, not `red`; the notices must not be expanded to all of Manzhou or Chunri Township or to other Indigenous areas in Pingtung.

Transport changes: Provincial Highway 20 from 149K+110 to 171K+500, Xiangyang to Lidao in Haiduan Township, entered preemptive closure at 18:00 on August 31. The South Cross-Island Highway temporary Provincial Highway 20 Route 105 Meishankou-Xiangyang section also remains closed from September 1, so Haiduan in Taitung and Taoyuan in Kaohsiung remain `transport / watch`. No formal reopening notice was found in this scan for the Highway 7A 61K Huanshan event in Taichung's Heping District, so Heping remains `transport / watch`, not `red`.

Nationwide regional scan — North: Wulai, Fuxing, Guanxi, Jianshi, Wufeng, Nanzhuang, Shitan, and Tai'an remain `monitoring`. No new heavy-rain warning, severe-thunderstorm alert, level-one inundation alert, slope-alert escalation, Indigenous road interruption, evacuation, shelter activation, work/class suspension, or major public-service interruption was identified for these monitored northern areas.

Nationwide regional scan — Central: Heping remains `transport / watch`. Ren'ai, Yuchi, Xinyi, and Alishan remain `monitoring` at this information time.

Nationwide regional scan — South: Only Changle Village in Manzhou Township and only Shiwen Village in Chunri Township are under `work-school / watch` for the September 1 suspension. Kaohsiung Taoyuan remains `transport / watch`. The Tainan mountain area, Kaohsiung Namasia and Maolin, and Pingtung Sandimen, Wutai, Majia, Taiwu, Laiyi, Shizi, and Mudan remain `monitoring` at this information time.

Nationwide regional scan — East: Datong and Nan'ao in Yilan and the monitored Indigenous areas in Hualien remain `monitoring`. Haiduan remains `transport / watch`, while the other monitored Indigenous areas in Taitung remain `monitoring`. Wanli River remains `monitoring`.

Weather, flood, and slope alerts: At this information time, the CWA heavy/torrential-rain page had no county-level advisory, and the Water Resources Agency inundation-alert page showed Taiwan below alert thresholds. The scan found no new severe-thunderstorm alert, level-one inundation alert, debris-flow or large-scale-landslide escalation, rapid stream rise, evacuation, shelter activation, major agricultural-loss warning, or major water/power/public-service interruption affecting monitored Indigenous areas.

Wanli River: The Forestry and Nature Conservation Agency's August 31 monitoring stated that the natural dam remained intact, the lake was stably overflowing, and forecast 12- and 24-hour rainfall remained below alert-release thresholds. Wanli River therefore remained `monitoring`.

Alert level: The site's overall level remained `watch`. Changle Village and Shiwen Village were `work-school / watch`; Haiduan, Taoyuan, and Heping were `transport / watch`. None of these conditions were `red`.

Recommended action: Residents, students, schools, and relevant agencies in Changle and Shiwen villages should follow Pingtung County and Directorate-General of Personnel Administration notices. Other villages should not assume the same work/class status unless separately announced. Road users in Haiduan, Taoyuan, and Heping mountain areas should follow Highway Bureau closure, clearance, and reopening notices and must not enter closed road sections.

Official notices govern.

04:02 Update: Heavy-Rain Advisory Takes Effect for Southern Taiwan and Taitung; Related Indigenous Areas Are weather / watch

Information time: September 1, 2026, 04:02.

Official sources: Central Weather Administration heavy-rain advisory issued at 01:05; Directorate-General of Personnel Administration work/class update at 03:35:18; Highway Bureau; Agency of Rural Development and Soil and Water Conservation; Water Resources Agency; Forestry and Nature Conservation Agency; and relevant local authorities.

Weather change: At 01:05, the Central Weather Administration issued a heavy-rain advisory because a low-pressure belt could bring short-duration intense rainfall. It stated that southern Taiwan, Taitung, Orchid Island, and Green Island might experience localized heavy rain on September 1, with lightning, strong gusts, and ponding in low-lying areas also possible. This was a new official advisory after the 00:22 update, so related Indigenous areas moved from `monitoring` to `weather / watch`, not `red`.

Regional scan — North: Wulai, Fuxing, Guanxi, Jianshi, Wufeng, Nanzhuang, Shitan, and Tai'an remained `monitoring`, with no new threshold-level official change identified.

Regional scan — Central: Because Alishan in Chiayi fell within the advisory's southern-Taiwan coverage, Alishan was `weather / watch`. Heping remained `transport / watch` because of the Highway 7A 61K Huanshan fallen-tree incident. Ren'ai, Yuchi, and Xinyi remained `monitoring`.

Regional scan — South: The Tainan mountain area, Kaohsiung Taoyuan, Namasia and Maolin, and monitored Pingtung areas including Sandimen, Wutai, Majia, Taiwu, Laiyi, Chunri, Shizi, Mudan, and the Changle Village area in Manzhou were `weather / watch`. Taoyuan also remained `transport / watch`; Shiwen Village in Chunri and Changle Village in Manzhou also remained `work-school / watch`.

Regional scan — East: Monitored Taitung Indigenous areas including Taitung City, Beinan, Luye, Yanping, Guanshan, Chishang, Donghe, Chenggong, Changbin, Haiduan Township, Jinfeng, Taimali, Dawu, Daren, and Lanyu were `weather / watch`. Haiduan also remained `transport / watch`. Datong and Nan'ao in Yilan and the monitored Indigenous areas in Hualien remained `monitoring`; Wanli River remained `monitoring`.

Other official alerts: CWA's severe-thunderstorm information page showed no active event in that scan. The Agency of Rural Development and Soil and Water Conservation listed zero debris-flow red alerts, zero debris-flow yellow alerts, zero large-scale-landslide red alerts, and zero large-scale-landslide yellow alerts. No new level-one inundation alert, formal evacuation, shelter activation, major agricultural-loss warning, or major water/power/public-service interruption affecting monitored Indigenous areas was identified.

Work/class status: The Directorate-General of Personnel Administration's 03:35:18 update still listed only Shiwen Village in Chunri Township and Changle Village in Manzhou Township for work/class suspension; it did not extend either suspension township-wide.

Forest and stream monitoring: The Forestry and Nature Conservation Agency's August 31 Wanli River monitoring still showed the natural dam intact with stable overflow and forecast rainfall below alert-release thresholds. In Shizi Township, Shuangliu National Forest Recreation Area remained open, but its wading area remained temporarily closed because creek water was still high; this was a facility/stream `watch`, not `red`.

Transport: Provincial Highway 20 from 149K+110 to 171K+500, Xiangyang to Lidao in Haiduan, remained under precautionary closure. The South Cross-Island Highway temporary Provincial Highway 20 Route 105 Meishankou-Xiangyang section between Kaohsiung Taoyuan and Taitung Haiduan also remained closed from September 1. The Highway 7A 61K Huanshan fallen-tree incident in Taichung's Heping District remained listed in Highway Bureau provincial-road information, with no formal reopening notice found in that scan. These were all `transport / watch` conditions.

Alert level: The site's overall level remained `watch`. This update concerned heavy rain plus continuing transport and work/class watches; none was a red alert.

Recommended action: Indigenous communities in southern Taiwan, Alishan, and Taitung should watch for short-duration intense rain, lightning, strong gusts, ponding in low-lying areas, and mountain-road rockfall or slope hazards. Road users in Haiduan, Taoyuan, and Heping should follow the Highway Bureau's latest access notices and must not enter closed road sections. Changle and Shiwen villages should follow local-government and Directorate-General of Personnel Administration work/class suspension notices.

Official notices govern.

08:00 Update: Heavy-Rain Advisory Cleared; Taitung Forest Recreation Precautionary Closures Continue

Information time: September 1, 2026, 08:00.

Official sources: Central Weather Administration heavy/torrential-rain advisory page; Forestry and Nature Conservation Agency Taitung Branch August 31 precautionary-closure notice; Directorate-General of Personnel Administration 07:41:19 work/class update; Highway Bureau; Agency of Rural Development and Soil and Water Conservation; Water Resources Agency; and relevant local authorities.

Weather downgrade: The Central Weather Administration heavy/torrential-rain advisory page now shows no county with an active advisory. The earlier `weather / watch` for southern Taiwan, Alishan, and Taitung therefore returns to `monitoring`. This is a substantive official downgrade and is not a `red` alert.

Public-service change: The Forestry and Nature Conservation Agency Taitung Branch states that, because of continued rainfall, Zhiben National Forest Recreation Area, Jiaming Lake National Trail, Dawu Ocean View Trail, Green Island Ameishan Trail, Xiangyang Hut, and Jiaming Lake Hut have been under precautionary closure since 13:00 on August 31, with reopening to be announced separately. No official reopening notice was found in this scan.

Affected Indigenous areas: Beinan, Haiduan Township, and Dawu are classified `public-service / watch` because of the forest recreation, trail, and hut closures. Haiduan also remains `transport / watch`. These are precautionary public-service and mountain-access controls and must not be labeled red.

Regional scan — North: Wulai, Fuxing, Guanxi, Jianshi, Wufeng, Nanzhuang, Shitan, and Tai'an remain `monitoring`, with no new threshold-level official change identified.

Regional scan — Central: Alishan's earlier `weather / watch` has cleared and returned to `monitoring`. Heping's existing `transport / watch` continues. Ren'ai, Yuchi, and Xinyi remain `monitoring`.

Regional scan — South: The earlier weather watches for the Tainan mountain area, Namasia, Maolin, and most monitored Pingtung Indigenous areas have cleared. Taoyuan remains `transport / watch`. Shiwen Village in Chunri Township and Changle Village in Manzhou Township remain `work-school / watch`. The Shuangliu wading-area restriction in Shizi remains a facility/stream `watch`. Sandimen and the other monitored Pingtung areas without a continuing specific official restriction return to `monitoring`.

Regional scan — East: The earlier Taitung `weather / watch` has cleared. Beinan, Haiduan, and Dawu are `public-service / watch` because the Taitung Branch forest recreation closures continue, and Haiduan also remains `transport / watch`. Datong and Nan'ao in Yilan, monitored Indigenous areas in Hualien, and Wanli River remain `monitoring`.

Slope, flood, and other alerts: Soil-and-water-conservation information reviewed in this scan was at monitoring status rather than a new debris-flow or large-scale-landslide red/yellow escalation. No new level-one inundation alert, rapid stream rise, formal evacuation, shelter activation, major agricultural-loss warning, or major water/power/public-service interruption affecting monitored Indigenous areas was identified.

Transport status: The Highway Bureau continues to list the Provincial Highway 20 Xiangyang-Lidao section in Haiduan under precautionary closure and the Meishankou-Xiangyang section as not open from September 1. Taoyuan and Haiduan therefore remain `transport / watch`.

Work/class status: The Directorate-General of Personnel Administration's 07:41:19 update still lists Shiwen Village in Chunri Township and Changle Village in Manzhou Township as suspending work and classes. The official status is village-specific and must not be expanded to the whole township.

Alert level: The site's overall level remains `watch`. The weather watch has ended; current watches are mainly transport, work/class suspension, forest recreation/public-service restrictions, and localized facility restrictions. There is no red alert in this scan.

Recommended action: Mountain visitors in Beinan, Haiduan, and Dawu should follow the Taitung Branch's latest reopening notices and must not enter closed forest recreation sites, trails, or huts. Road users in Haiduan and Taoyuan should follow the Highway Bureau's latest access notices. Shiwen and Changle should continue to follow local-government and Directorate-General of Personnel Administration notices. Other areas remain under official monitoring.

Official notices govern.

16:06 Update: Highway 24 at 43K+700 in Wutai Blocked Both Ways; Xiangyang-Lidao in Haiduan Reopened

Information time: September 1, 2026, 16:06.

Official sources: Highway Bureau Southern Region Branch 13:25 Wutai blockage notice, 11:06 Taoyuan clearance notice, and 08:24 Haiduan reopening notice; Central Weather Administration; Directorate-General of Personnel Administration 15:43:26 update; Agency of Rural Development and Soil and Water Conservation; Forestry and Nature Conservation Agency; and relevant local authorities.

New road interruption: In Pingtung County's Wutai Township, Provincial Highway 24 at 43K+700 is blocked in both directions by a slope collapse caused by the August 31 heavy rain. The Highway Bureau's 13:25 notice said clearance was expected by 16:00. At the 16:06 scan, the official website still listed the blockage notice and no formal reopening notice was found. Wutai is therefore `transport / watch`, not `red`; reopening must not be assumed until the Highway Bureau confirms it.

Road restoration and continuing controls: In Kaohsiung's Taoyuan District, Provincial Highway 20 at 87K+500 was blocked by a slope collapse at 09:00 and the Highway Bureau announced that it was reopened at 10:40. In Taitung's Haiduan Township, Provincial Highway 20 from 149K+110 to 171K+500, Xiangyang to Lidao, had its precautionary closure lifted at 08:00 and returned to normal traffic. However, the South Cross-Island Highway temporary Provincial Highway 20 Route 105 Meishankou-Xiangyang section remains closed from September 1. Taoyuan and Haiduan therefore retain `transport / watch`, but the Xiangyang-Lidao main-line segment must no longer be described as closed.

Nationwide regional scan — North: Wulai, Fuxing, Guanxi, Jianshi, Wufeng, Nanzhuang, Shitan, and Tai'an remain `monitoring`, with no new threshold-level official change identified.

Nationwide regional scan — Central: Heping's existing `transport / watch` continues because no formal reopening notice for the Highway 7A 61K Huanshan event was found in this scan. Ren'ai, Yuchi, Xinyi, and Alishan remain `monitoring`.

Nationwide regional scan — South: Wutai now has an active Provincial Highway 24 road-blockage `transport / watch`. The Highway 20 87K+500 blockage in Taoyuan has been cleared, but Taoyuan remains `transport / watch` because temporary Provincial Highway 20 Route 105 Meishankou-Xiangyang is still not open. Shiwen Village in Chunri Township and Changle Village in Manzhou Township remain `work-school / watch` under the Directorate-General of Personnel Administration's 15:43:26 update. No other new threshold-level official change was identified for the monitored southern Indigenous areas.

Nationwide regional scan — East: The Xiangyang-Lidao main-line Highway 20 segment in Haiduan has reopened, but the Route 105 restriction keeps Haiduan at `transport / watch`. Beinan, Haiduan, and Dawu remain `public-service / watch` because the Taitung Branch forest recreation precautionary closures continue. No new threshold-level official change was identified for the monitored Indigenous areas in Yilan, Hualien, or the other Taitung areas. Wanli River remains `monitoring`.

Other official alerts: The Central Weather Administration currently shows no county under an active heavy/torrential-rain advisory. The Agency of Rural Development and Soil and Water Conservation's September 1 heavy-rain emergency group remains activated, but debris-flow red alerts are 0, debris-flow yellow alerts are 0, large-scale-landslide red alerts are 0, and large-scale-landslide yellow alerts are 0. This scan found no new level-one inundation alert, active severe-thunderstorm message affecting the monitored areas, formal evacuation, shelter activation, major agricultural-loss warning, or major water/power/public-service interruption. The latest official Wanli River monitoring continues to show the natural dam intact with stable overflow and forecast rainfall below the alert-release threshold, so it remains `monitoring`.

Alert level: The site's overall level remains `watch`. Wutai is the new `transport / watch`; Taoyuan, Haiduan, and Heping retain transport watches; Changle and Shiwen retain `work-school / watch`; and selected Taitung forest recreation areas remain `public-service / watch`. There is no red alert in this scan.

Recommended action: Do not enter the blocked Highway 24 43K+700 section in Wutai until the Highway Bureau formally confirms reopening; follow official detours or delay travel. Road users in Taoyuan and Haiduan should follow the latest South Cross-Island Highway controls. Changle and Shiwen should follow the work/class suspension notices, and forest visitors should follow Forestry and Nature Conservation Agency reopening information.

Official notices govern.