On 22 September, the Libyan National Meteorological Center warned that thunderstorms could cause flooding in low-lying areas and trigger flash flooding and local wadi (valley) overflow. The forecast area of concern included the northwest and central belt, encompassing the Jafara Plain and Jabal Nafusa. According to local weather reports, a strong thunderstorm cell formed between Mizdah, Nasmah, Tininai, and the western part of Bani Walid, accompanied by heavy rain and wadi flows. Emergency teams were put on high alert as waters rapidly rose along key roads connecting Mizdah, Nasmah, and surrounding rural communities.
Some areas around Sokna in the Jufra Oasis were flooded after heavy rainfall. Three members of a family were reportedly killed when their vehicle was submerged by floodwaters in Wadi Zagar (near Sokna).
On 24 September, heavy rain began producing damaging runoff in the Mizdah–Nasmah area. Floodwaters also began to isolate areas and disrupt road access.
During the night from 24 to 25 September, overflowing wadis and mud-laden flash floods entered homes and urban streets in Mizdah, al-Shgeiga, and Nasmah, damaging roads and washing away or trapping vehicles. Major roads were closed, and electricity infrastructure was damaged. Emergency services conducted evacuations. Health authorities reported large numbers of flood-related injuries. A major bridge connecting Mizdah to the Tininai area collapsed under surging waters, isolating local communities. The Nasmah hospital was reportedly completely evacuated after floodwater entered its departments and facilities.
On 25 September, PM Abdul Hameed Dabaiba declared a state of emergency for affected southwestern zones, ordering an emergency mobilization and tasking the Air Ambulance Service with evacuations from al-Shgeiga. Bulldozers, trucks and heavy equipment were sent to help with rescue operations and cleanup efforts.
Local authorities reported that over 79 people sustained injuries in Mizdah alone due to flood-related collapses and fast-moving debris. A Wadi Washtata flooding led Bani Walid security to close the road toward Tarhuna. In Ghadames, there was severe localized flooding and soil erosion. Several vehicles were stranded in swollen wadis. Emergency crews successfully rescued workers who were stranded, including an engineer from the Great Man-Made River Company whose vehicle stalled in an overflowing wadi.
On 26 September, while the flood risk remained elevated, the operational focus shifted to rescue work, medical treatment, road clearance and repairs, other cleanup efforts, and restoring utilities. As water levels began to slowly recede, the delivery of aid, emergency supplies, and equipment started in cut-off regions.
In total, at least 147 people were reported injured, four dead and several missing. Most of the injured were treated in hospitals in Mizdah, al-Shgeiga, and Nasmah.
Weather warnings were extended toward southwestern Libya, including areas around Ghat, Awbari, Sebha and Murzuq because further flash flooding remained possible.
On 27 September, Ghat and Awbari districts received heavy rain and thunderstorm activity that triggered local flash flood warnings and minor structural inundations.
On 28 September, heavy flooding continued to sweep through Ghat, spreading into residential areas such as Tandamira, Kalalah and the neighbourhood of the Chinese Company. Local authorities and the Libyan Red Crescent issued urgent warnings about the rapidly changing water levels, urging citizens to steer clear of low-lying areas, wadis and fast-flowing water, while emergency teams stepped up their field operations.
In Taraghin (east of Murzuq) a man was killed when the roof of a mosque collapsed due to heavy rain.
A military medical corps team began a campaign in Mizdah to spray insecticides and disinfect areas where floodwaters have accumulated, aiming to curb the spread of harmful insects that proliferate after heavy rains and standing water. The municipality announced that spraying operations would take place at night, and urged residents to remain indoors while the work is carried out. The campaign forms part of broader efforts to address the consequences of recent flooding and reduce the public health risks associated with stagnant water and insect infestations.