Federation says it fears death toll of nearly 600 will continue to rise as rescuers reach cut-off areas

• Nepal-Tibet flash flood – latest updates

• Visual guide: how the deadly flooding unfolded

• Tell us: have you been affected by the flash floods?

The Red Cross has said at least 93,000 people may have been affected by Wednesday’s flash floods on the Nepal-Tibet border, which have killed nearly 600 people, left another 1,900 missing, and triggered a huge rescue operation that is being hampered by fears of new flooding.

The International Federation of Red Cross and Red Crescent Societies (IFRC), the world’s largest humanitarian network, said it feared the death toll would continue to rise as some of the hardest-hit areas remained inaccessible after roads and bridges were destroyed by the torrents.

Desperate relatives trying to reach loved ones last seen in area where entire villages have been swept away

• Nepal-Tibet flash flood – latest updates

• Visual guide: how the deadly flooding unfolded

• Tell us: have you been affected by the flash floods?

Families are rushing to Nepal to search for the 33 British nationals who are still missing, as fears mount over the risk of a second wave of flooding in the region.

The catastrophic flash floods that hit Nepal and Tibet on Wednesday, thundering down valleys and sweeping away entire villages, have killed at least 538 people, while more than 1,500 remain missing.

Flash flooding and mudslides in Ishikawa and Toyama prefectures, while convective storms hit western Europe

After an “unprecedented” deluge in Chiba in mid-August, Japan has experienced further extreme rainfall in recent days. Moisture from the Sea of Japan brought relentless heavy rain to the prefectures of Ishikawa and Toyama on Thursday.

In Himi, Toyama, 361.5mm of rain fell in 24 hours, equivalent to half the average annual rainfall in London and Paris. Several rivers burst their banks, triggering flash floods and mudslides, felling and damaging buildings.

Risk of fresh flooding had forced rescue teams to withdraw as residents rushed up hills to escape possible river surge

• Nepal-Tibet flash flood – latest updates

• Visual guide: how the deadly flooding unfolded

• Tell us: have you been affected by the flash floods?

Rescuers searching for survivors of deadly flash floods on the Nepal-Tibet border have resumed their efforts after suspending operations when a debris dam burst its bank on Friday, increasing the risk of fresh flooding.

Residents in Nepal’s Rasuwa district, on the border with Tibet, were seen rushing up hillsides ⁠on Friday to escape a possible surge in the river, ⁠according to witnesses. Fears of another flood came as authorities in Nepal and China said that at least 543 people had been killed in the disaster.

This live blog is now closed

• ‘The flood took everything I have’: survivors grieve for relatives and homes swept away in Nepal

• Visual guide: how the deadly flooding unfolded

• Tell us: have you been affected by the flash floods?

More now on the Nepali army’s rescue operation to save about 100 people trapped in a tunnel at a hydropower project swamped by Wednesday’s flooding.

“Two helicopters have been dispatched but it is challenging because it is tough to even locate the entry points of the tunnel,” army spokesperson Raja Ram Basnet told AFP.

Relief efforts are also under way to provide the rescued people what they need.

The army is still working to safely evacuate more than 100 people trapped in the same tunnel.