00:02İzlediğiniz için teşekkür ederim.
00:30This is how to save yourself.
00:32A policeman said be prepared to leave your house within about 10 minutes.
00:36Your property.
00:37If this were their home, how would they feel?
00:40Your business.
00:41I was just watching this thing get ever closer to destroying everything that we had.
00:45And even your pet.
00:46Every time he moved, he was just getting sucked further in.
00:49I genuinely thought, you know, he was going to have to just be shot here in the hole.
00:53When a sinkhole attacks and disaster strikes.
01:07There are two ways to avoid a sinkhole catastrophe.
01:10One is to rely on luck.
01:14The other is to spot the early warning signs and take action before it's too late.
01:19Something that back in 2015, the residents in this quiet suburb of St Albans failed to do.
01:30I heard something go about half past one in the morning.
01:33And then I heard movement and I thought, something's happened.
01:39This fireman, when he said there was a hole in the road and it was growing.
01:43He said, we're evacuating the streets now.
01:47A giant sinkhole had appeared in the middle of the road and it was huge.
01:52It was 66 feet wide and 33 feet deep.
01:55But it had started as a much smaller hole a few days earlier.
02:01Local resident Ken Hill was driving to the shops when he spotted something strange at the side of the road.
02:07It was the early warning sign of a sinkhole.
02:10But Ken, like everyone else in the street, didn't know it.
02:14Wednesday lunchtime I was off out.
02:16And as I got to the end here, I noticed that there was a postman being picked up out of
02:22a manhole.
02:22And I thought, what's going on there?
02:24The manhole in the pavement had given way.
02:27But Ken didn't think anything of it until a few days later.
02:30Then on a Sunday, one of my neighbours threw a stone down there and he said, well, that went a
02:34long way.
02:35We realised then there was a hell of a lot of depth to the thing than everybody first thought.
02:40That neighbour was retired civil engineer Ray Postel.
02:44He approached the postman's swallowing pothole to see how deep it really was,
02:48not realising that he was standing on dangerous ground.
02:52The day before the collapse, I stood throwing stones down.
02:56And where I was standing, the next day, was in midair.
03:06The very last people to drive over the spot where Ray had been standing
03:09were musicians from the aptly named band Free Fall Jazz.
03:15Every week they practice at Julia May's house,
03:18and as fate would have it, their practice session fell on the night of the sinkhole.
03:23When the session ended, each one of them drove home,
03:26right over the spot where the sinkhole was about to open up.
03:31All the rest of the stuff.
03:33Bass player Chris Mottram-Wister was the last to leave.
03:37At that time of night, there aren't normally other cars driving around.
03:41I was probably the last one to go over that bit of ground.
03:46Finally, she set off at around 12.30 in the morning.
03:49When I left, there was nothing that I could see in the dark anyway.
03:57Chris had no idea she was driving over a road on the verge of collapse.
04:03Appearing in the middle of the night,
04:06a huge crater dangerously close to sleeping residents.
04:10Rupturing gas mains, leaving people living here without water or electricity.
04:16The residents had missed the sign of the sinkhole.
04:19But they'd been lucky.
04:21No one was killed or injured.
04:25Now they could only stand and watch as the sinkhole grew and grew.
04:30So what we thought was a hole that just did the body of the road
04:34then started to take the pavements
04:37and then it started to take the gardens
04:38and then there was a car on the edge.
04:40It was like, this thing is just getting bigger and bigger and bigger.
04:44When's it going to stop? Is it going to take the house?
04:45It was only in the morning and I saw the helicopter shots
04:49and then I thought, I think I recognise that road.
04:52You know, that looks familiar.
04:53A few minutes more maybe, it might have, um...
04:56I never thought about that.
04:58If we'd have carried on talking for another half an hour, we'd have seen it.
05:01Yeah, could have seen it.
05:02Yeah.
05:03Or worse.
05:05A few minutes later,
05:07and Chris's car would have plunged headfirst into a 10-metre deep hole.
05:14City sinkholes can be devastating and deadly.
05:19Cars and their drivers are often victims.
05:22In Los Angeles in 2017, this sinkhole swallowed a car.
05:28Luckily, emergency crews were quickly on the scene
05:31and the woman was saved
05:33just moments before a second car toppled over the edge.
05:42But there are some parts of the world where sinkholes are so common,
05:46you cannot rely on luck.
05:49Florida is a place where new sinkholes appear every week
05:53and where you can't afford to miss the early warning signs
05:56because that can be the difference between life and death.
06:03This popular resort is just 10 miles from Disney World.
06:07At the height of the summer,
06:09the last thing any holiday maker here would expect
06:11when they went to bed at night
06:12would be for their luxury villa to be torn apart by a sinkhole.
06:17But that's exactly what happened one fateful August night in 2013.
06:22In the dark of night, about 30% of a three-story building
06:26just collapsed, swallowed up by a 100-foot sinkhole.
06:31Our room itself is over 100 feet underground.
06:34The next day, the building was still moving.
06:36And when you come up on a scene and see this
06:39in the middle of the night,
06:40how could there not be someone injured?
06:53Sinkholes can strike anywhere at any time.
06:56But while some can strike without warning,
06:59there are often small clues that precede the moment of a collapse.
07:03So the best way to avoid a sinkhole tragedy
07:06is to be alert to those early signs of a sinkhole.
07:16Summer Bay is a popular resort near Orlando in Florida,
07:21just 10 miles from Disney World.
07:23At the height of the summer, in August 2013,
07:27it was packed with families enjoying a fun-filled vacation.
07:32Each building here houses 12 timeshare apartments.
07:36But on the night of the 11th of August,
07:38a sudden hole in the ground
07:40transformed a luxury holiday apartment block
07:42into rubble.
07:53Terrified holidaymakers watched in disbelief
07:56as an entire apartment building collapsed in on itself
07:59and pulled a second block down with it,
08:02crumbling into a 60-foot-wide crater.
08:08This looked like it could be one of America's worst-ever sinkhole catastrophes.
08:12So when the resort's president, Paul Caldwell,
08:14arrived on the scene in the early hours of the morning,
08:18that's exactly what he expected to find.
08:20I was here about 5 o'clock in the morning,
08:23and when you come up on a scene and see this in the middle of the night,
08:27your first reaction is,
08:28how could there not be someone injured?
08:31There were 36 people in this building just minutes before it collapsed.
08:35And yet, incredibly, despite the devastation and destruction,
08:40not one person had been killed or injured.
08:42There wasn't a scratch, a cut, a nick,
08:46no physical injuries.
08:49This remarkable fact was all down to the quick thinking
08:52of an alert employee
08:53who spotted the early signs of a sinkhole.
08:56One of my security guards was walking about here and crack,
08:59and then he heard a second window crack.
09:22There we go by maybe there that can be teleporting to him.
09:28It was the Eastern Standard Flow.
09:28Thank you, Steve.
09:28There was an alert employee
09:28You would've gone for that information in the first place.
09:29You can also see through that man ago,
09:29he would've gone for that tour.
09:29Never happened to the camera now as to the leftgia etc.
09:42And maybe he didn't he'll.
09:42I think there was an gehabt制 of the broadband in the morning
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