but if one of us is in trouble, no matter where it is, we'll go and help. the man they rescued was an experienced caver in his 40s. when he fell, he broke bones in his leg and jaw. there was no way he could make his own way out. it's hard to fathom on the surface, but beneath us here are 37 miles worth of tunnels criss—crossing between the caves. there are only three ways in and out and this tiny metal door is one of them, an entrance to hidden world. it was here at cwm dwr that the caver entered with his group on saturday. they'd travelled around 500 metres when he fell from a ledge. his friends raised the alarm. the route back was too narrow and so the rescuers had to carry him 3km towards the top entrance. manoeuvring a stretcher meant it took ten times longer than usual, clocking up 5a hours — the longest carry in uk caving history. if you can imagine lots of passages, some big, some small, chambers, but they're all kind of stacked on top of each other, overlapping each other. tom is one of the 300 volunteers who put in a shift. he says one of the biggest challenges was taking a floating stretcher through a long, perilous section of water. it has lots of little cascades, waterfalls, and also very deep potholes full of water. you'd be out of your depth if you went into it and potentially had to swim across. and you had to get a stretcher over all of that? yeah, that's right. it's rare for cavers to be in the limelight. for these volunteers the only reward is knowing others will come to their aid. hywel griffith, bbc news, at the nynnon ddu cave. now on bbc news, it's time for our world. this summer, greece was on fire. thousands of wildfires were fanned by its worst heatwave in decades. hardest hit was the country's second largest island, evia. the government has blamed climate change. i'm a firefighter for 23 years and as i can remember, there is no similar situation. here, the fires were catastrophic. around a third of the island was burnt. thousands of people had to flee their homes. and a way of life was destroyed. evia, off the coast of mainland greece. dense pine forests, beautiful beaches, and the sea. but this summer, a wildfire tore through the north of the island. it was the largest fire in greece since records began. over 50,000 hectares of woodland were burnt. it took almost two weeks to bring the blaze under control. i was sent to report on the fires this summer. two months on, i've come back to see the aftermath. this is lieutenant colonel stratos anastasopoulos who's responsible for co—ordinating firefighting aircraft across greece. chopper whirrs. he'd offered to take me up to see the extent of the destruction. i'm a firefighter for 23 years and as i can remember, there is no similar situation. it was a war above the fires because we had a lot of fires all over in greece. almost 100 fires per day for five or six days period. so it was very, very difficult for us. what was different about the fires this year? i think that the conditions, the weather conditions was very different from the other years. i think all of us, we can see the climb of changes. so we must think about all our lives and the life of natural environment. that is not only greece problem or americans problem or italians problem, no, it's a global problem. the forest i saw with stratos was evia's economy. on this island, many rely on the woodlands for their income. nikos dimitrakis is a farmer and beekeeper. he's one of hundreds of people here to have lost his livelihood. he feels the authorities should have sent more firefighters to put out the fires. are you ready? honey. how does it look? is it healthy looking? it's all right. it survived. it's incredible. the government is blaming climate change for these fires. hundreds of foreign firefighters were sent to greece to help. the government said it did all that was humanly possible to combat the blazes. but it said the fires were too intense for their defences. honey from pine trees accounts for 70% of greece's total honey production. and until the fires, two—thirds of greek pine honey was produced here in evia's huge forests. goat bells ring. the fires have affected the honey trade across the country. alexandra kakarouna lives 500kms away, in western greece. she started beekeeping as a child with her father. now she and her father run a honey business. like many greek honey producers, she used to take her beehives to evia for the pine tree pollen, but that's no longer possible. where does this honey come from? where did it used to come from? how many other honey producers are being affected? are you worried about the future of honey production here in greece? the forests that nikos and alexandra rely on for their bees will eventually regenerate if they can be protected from future fires. but the trees will take up to 30 years to grow back. the forests that nikos and alexandra rely on for their bees will eventually regenerate if they can be protected from future fires. but the trees will take up to 30 years to grow back. chainsaw whirrs there's a real danger of erosion and flooding when the rains come. chainsaw whirrs the race is on to create protective terraces of logs to stop landslides this winter. the forestry department has hired teams of locals to cut down burnt wood all over northern evia to make space for new trees to grow. chainsaw whirrs it wasn't just the island of evia. this summer, athens was burning too. we came here in august, we stood here and we watched, first of all there was smoke coming over that mountain, and then we saw the flames coming over the mountain and the hillside burning. to see all the...where the fire actually... elias tziritis works for the world wildlife fund and is also a volunteer firefighter who worked right here in this suburb this summer. he's concerned that megafires will happen again and again, unless there's more focus on prevention. here we are in the... 0k, we are here. in the beginning, we think that it was one more fire to fight. this is the fire that get out of control very easily and with no wind. and what happened right here? how did the flames get so close to the houses? as you can see, the forest is mixed with housing. the majority of the fires start from cities to the forest. so these are red areas. what did you think when you heard the government blame climate change for this fire? the politicians here in greece say the problem of forest fires is climate change, but you know, climate change is one of...one of the criteria to have more intensive forest fires, it's not the ultimate criteria. and the forest fires don't start from climate change. we have 10,000 incidents in the country, 40% of them are negligence. elias says forest management is essential. fires can be stoked by dry, broken branches and dead leaves. known as forest fuel, this can be highly flammable and needs to be cleared. the main problem in greece with forest fires is the concentration of forest fuels. so we must find clever ways to decrease the forest fuels. post—fire management is very crucial, we must take the correct decisions in order to protect forests, to protect soil, to prevent erosion. if we don't solve the causes of fires, you have done nothing. are you worried that if there are more heatwaves next year and then years to come, we're going to see more huge megafires like this? the recent scientific results showed us that we are going to have more heatwaves, more days of fire danger, so the things are not so optimistic about forest fires and the beginning of megafires in the future. if you ask our colleagues in spain, portugal, italy or turkey, they're going to explain to you that the new trend in forest fires is megafires, the megafires are affected by climate change. so we must believe in prevention in order to answer climate change. and we see the effect of climate change across europe, when you see countries that recently were not affected from forest fires, like romania, poland, sweden, scandinavian countries, so you see that fires are going up north in europe. how do we fight climate change? we must take serious political decisions. we must cut the emissions in order to stop or to slow climate change. 0n the other hand, we must prepare the citizens to adjust to the new reality. i'm very confident about nature, nature is going to do the work. the mediterranean forests are used to forest fires. it's inside the rehabilitation mechanism. so i trust nature. what i don't trust — i don't trust humans! laughs applause back in evia, nikos is getting married. he's invited us to the civil wedding. he and his wife evmorfia are expecting a baby. a little boy. traditional music plays your son is going to grow up with the forest, in a way, so he's going to grow up with the new forest that's growing now. a day after his wedding, i met nikos again in his half burnt orchards. he'd brought some honeycomb from his hives. mmm, that's good! it's really good. i've never had honey out of a — directly out of a hive before. so good. mmm. he told me it felt like the end of an era. evia's forest will eventually grow back if new fires can be prevented. but these burnt trees are an unsettling reminder of how fragile this landscape is, especially if megafires in the mediterranean become the new normal. hello there. it was nearly 18 degrees celsius in cheshire yesterday, temperatures which are well above where they should be for this time of year. it will be mild again for the day ahead because we've got that south—westerly wind off the atlantic, but with it, some rain. that rain is all tied in with this weather front here, which is pulsating, if you like, bringing some further outbreaks of rain through the small hours and into the start of the day, and it will be on and off throughout the day. it is coming into high pressure and it's weakening and to the north of it, the showers have been fading back to the coast with one or two around, but with clear skies actually it is turning chilly, a touch of frost in rural areas. whilst further south, temperatures of ii and i2 are more like where they should be during the day at this time of year. but it's misty, it's murky, some patchy fog around across southern and eastern areas and there will be some hill and coastal fog underneath our weather front, which as you can see is going to bring some rain. not too heavy but really rather dank, misty and grey conditions through the day. but mild, 14s and 15s, whilst it should start to break up the cloud for northern england tojoin in with northern ireland and scotland with just the odd shower and some sunshine. still a brisk wind with more showers for the north and west of scotland. and indeed here, through the evening and overnight, we'll have another band of showery rain moving southwards tending to weaken, but introduces a bit more cloud. so, perhaps the frost a little bit more patchy by the time we get to sunday morning. the cloud starting to break for the south because those weather fronts are rather weak and they are coming into this area of high pressure. so, we will have, i think, a few fog issues as well on thursday morning. so, once those clear away, and at this time of year, both the coming morning and tomorrow morning, it will take its time to clear and linger through the rush hour. once it does, some sunny spells, some rain is gathering on that southerly wind picking up further west, and you may have noticed this massive rain behind me. that is all tied in with a developing area of low pressure. here it is, there's a big question mark as to exactly where the wettest and windiest weather will be. but this is the capability of bringing gales and quite a bit of rain with it to end the week. so, it's one we will watch, do not take this as red because we'll be fine—tuning the details, but it looks as if he will be a mild into the week because those winds coming off the atlantic, but it should be moving out of the way in time for the weekend with a weakening feature, so we will see quite a bit of dry weather and still quite a bit of cloud into the weekend. bye for now. this is bbc news. i'm david eades. our top stories: the eu accuses belarus of gangster—style behaviour as the migrant crisis on the border with poland escalates. thousands are trapped in freezing conditions. a sobering message for the climate summit — scientists warn that even with the pledges in glasgow, temperatures are set to rise well beyond global targets. we cannot kick this can down the road. it is not something we can do in 2030, 2050, we need to do it in 2021 and 2022. a usjudge rejects an attempt by donald trump to block access to white house records about january's attack on the capitol.