Nantou, Taiwan—A sudden localized deluge turned a popular mountain recreation stream into a violent torrent Friday morning, sweeping away a group of backcountry hikers and leaving two dead. The disaster occurred at 11:30 a.m. along an upper tributary river section in Nantou County's rugged central mountain range. Emergency wilderness rescue teams and local tracking units were mobilized immediately after surviving group members managed to acquire cell reception to sound the alarm.

The National Fire Agency (NFA) confirmed that rapid-deployment swiftwater rescue teams extracted the bodies of two missing hikers from a congested boulder sieve nearly three kilometers downstream from the initial incident point. Emergency medical technicians analyzed the remains on a gravel river bank, noting that both individuals had sustained fatal blunt-force head trauma and widespread asphyxiation from drowning.

Initial weather summaries compiled by regional meteorologists indicated that while coastal regions remained dry, a stationary moisture front combined with localized thermal updrafts dropped over eighty millimeters of rain per hour along the higher mountain peaks. This concentrated precipitation funneled rapidly into the narrow slate canyon walls, causing the stream bed to rise more than two meters within a three-minute window, catching the backpackers completely exposed.

Surviving members of the hiking party recounted that the stream water turned murky and filled with floating leaf debris seconds before a roaring wall of brown water and heavy logs swept through the valley corridor. While three individuals managed to claw their way up the steep mud slopes to safety, the two victims were caught in the mid-stream channel while attempting a routine gravel bar crossing.

Dozens of elite search-and-rescue personnel, supplemented by specialized mountain tracking dogs and low-altitude thermal imaging drones, systematically audited the riverbanks and log jams throughout the afternoon. Muddy conditions and continued micro-burst rainfall hampered the footing of rescue dogs, requiring handlers to implement rope lines across the slippery stone channels.

Park administration officials noted that the group had registered for a standard multi-day wilderness permit, but had chosen to traverse an unmaintained riverbed route despite structural warnings concerning unstable summer weather fronts. Mountain security units have temporarily closed all backcountry access nodes across the district, turning away incoming groups at primary trailhead gates.

The remains of the two drowned hikers were carefully carried up the steep mountain trails by litter teams and transferred to the county mortuary for formal administrative documentation. Pathology workers will complete standard identification protocols and issue official cause-of-death declarations to municipal authorities.

The NFA maintained tracking stations along the lower river basin into Friday evening to ensure no secondary individual from unauthorized independent groups had been caught in the surge.

Civil defense officials have issued an urgent mountain advisory warning travelers that rapid ridge accumulation can trigger fatal stream surges even when lower trail segments display bright sunshine.