Laos will see more rain this week, with the Department of Meteorology and Hydrology warning of possible flash floods, landslides and urban flooding in vulnerable areas.
On 7 September, the department said the low-pressure trough will continue moving across central Laos, while the southwest monsoon remains active over most of the country. The conditions are expected to bring thunderstorms and scattered rain, with moderate to heavy rain and strong winds possible in parts of central and southern Laos.
In Vientiane, rain is expected in parts of the capital, including Pak Ngum, Sangthong, Xaythany, Sikhottabong, Sisattanak, Xaysettha and Naxaithong. Temperatures are forecast to reach around 34°C.
Rain is also expected in Vientiane Province, including Phonhong and Vang Vieng, as well as parts of Xaysomboun and Borikhamxay provinces.
The department warned that moderate rain could cause waterlogging in poorly drained areas. Heavy rain could trigger flash floods, landslides and rapidly rising water levels in streams, while rainfall above 90 millimeters could bring a higher risk of severe flooding and landslides.
Residents in vulnerable areas have been urged to monitor weather updates and official warnings, particularly during periods of prolonged rain.
Vientiane Checks Drainage Systems
Vientiane authorities are also preparing for further heavy rain.
Deputy Minister of Agriculture and Environment Saynakhone Inthavong inspected drainage systems and waterways in Xaythany and Sikhottabong districts on 4 September.
The inspection covered natural drainage channels in Vankham Village and the Huay Xay Moun Dam and drainage pump in Nong Da Village.
Saynakhone ordered authorities to urgently repair damaged water pumps, particularly those affected by damaged power lines, and ensure drainage systems are ready to operate during heavy rain.
Officials were also instructed to strengthen monitoring and planning to prevent water from reaching homes and agricultural areas.
Authorities in Sekong Province are also assessing damage from recent disasters in Kalum District.
Officials reported damage to roads and 9.7 hectares of productive land, including rice fields, upland farms and orchards.
On 5 September, district authorities donated LAK 40 million (USD 1,800) toward bridge repairs, along with supplies and school materials for affected communities.
The latest warning comes as several parts of Laos continue to recover from flooding and landslides caused by heavy rain in recent weeks.
Air Quality
Meanwhile, monsoon rains continue to shape weather conditions and air quality across Laos. In Vientiane Capital and the central region, air quality remains generally good, with average PM2.5 levels at around 8.2 μg/m³, within World Health Organization guidelines.
Air quality may occasionally reach AQI levels of 21 to 49 due to vehicle emissions and urban construction activity.
