Series 1 Episode 4
First Broadcast: 1AM Mon 19 May 2014

Is Britain now hotter than ever? Alex Beresford examines the science and the history of our weather to find out.

Alex learns about the dangers of heatwaves, when extreme hot weather can shut down transport, damage crops and give people heat exhaustion. He experiences the dangers of rising temperatures when he endures a simulated heatwave.

The programme examines the severe heatwave of 2003, which killed around 2000 people in Britain, when temperatures hit 100 degrees Fahrenheit in the South East.

Alex also examines the famous heatwave of 1976, when two months of prolonged warm temperatures caused a severe drought, and the Edwardian heatwave of 1911, which lasted nearly three months.

The Earth's position relative to the sun also makes temperatures go up or down. Alex investigates how the planet's alignment changes over time in a series of orbital cycles called Milankovitch Cycles. When the cycles align the planet can be plunged into an ice age; another one should arrive in around 1500 years.

But right now, a different factor is affecting our temperatures: CO2 emissions. Could hot deadly summers like 2003 soon become the norm in Britain?

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    1. Britain's Most Extreme Weather Heat Episode 4

      Is Britain now hotter than ever? Alex Beresford examines the science and the history of our weather to find out.

      • This episode has audio description available.
      • This episode has subtitles available.
      Watch the intro to Britain's Most Extreme Weather - Heat clips
      1. S1-Ep4: Heat Chamber This video is a intro S1-Ep4: Heat Chamber Video duration: 1:46 minutes

        Alex experiences intense heat when he endures a simulated heatwave
    2. Britain's Most Extreme Weather Floods Episode 3

      Should we be preparing for more flooding like in early 2014? This episode examines the scientific and historical…

      • This episode has audio description available.
      • This episode has subtitles available.
      Watch the intro to Britain's Most Extreme Weather - Floods clips
      1. S1-Ep3: Fast Floods This video is a intro S1-Ep3: Fast Floods Video duration: 2:15 minutes

        Alex experiences extreme flooding similar to early 2014
    3. Britain's Most Extreme Weather Ice Episode 2

      Are our winters going to get even colder? To find out, Alex Beresford explores the historical evidence and the latest…

      • This episode has audio description available.
      • This episode has subtitles available.
      Watch the intro to Britain's Most Extreme Weather - Ice clips
      1. S1-Ep2: The Polar Jet This video is a intro S1-Ep2: The Polar Jet Video duration: 1:04 minutes

        Examining the polar jet stream
      2. S1-Ep2: The Danger Zone This video is a clip S1-Ep2: The Danger Zone Video duration: 1:43 minutes

        Alex explores a wind chill with temperatures of minus 50 degrees
    4. Britain's Most Extreme Weather Storms Episode 1

      Alex Beresford examines whether we can expect a stormier future.

      • This episode has audio description available.
      • This episode has subtitles available.
      Watch the intro to Britain's Most Extreme Weather - Storms clips
      1. S1-Ep1: Winter Storms This video is a intro S1-Ep1: Winter Storms Video duration: 1:55 minutes

        The relentless winter storms of 2013 into 2014 were the best documented of all time
      2. S1-Ep1: Jet Stream This video is a clip S1-Ep1: Jet Stream Video duration: 1:28 minutes

        What caused the awful weather in the winter of 2013 to 2014?
    1. S1-Ep1: Jet Stream This video is a clip S1-Ep1: Jet Stream Video duration: 1:28 minutes

      What caused the awful weather in the winter of 2013 to 2014? Watch Britain's Most Extreme Weather Storms
    2. S1-Ep1: Winter Storms This video is a intro S1-Ep1: Winter Storms Video duration: 1:55 minutes

      The relentless winter storms of 2013 into 2014 were the best documented of all time Watch Britain's Most Extreme Weather Storms
    3. S1-Ep2: The Danger Zone This video is a clip S1-Ep2: The Danger Zone Video duration: 1:43 minutes

      Alex explores a wind chill with temperatures of minus 50 degrees Watch Britain's Most Extreme Weather Ice
    4. S1-Ep2: The Polar Jet This video is a intro S1-Ep2: The Polar Jet Video duration: 1:04 minutes

      Examining the polar jet stream Watch Britain's Most Extreme Weather Ice
    5. S1-Ep3: Fast Floods This video is a intro S1-Ep3: Fast Floods Video duration: 2:15 minutes

      Alex experiences extreme flooding similar to early 2014 Watch Britain's Most Extreme Weather Floods
    6. S1-Ep4: Heat Chamber This video is a intro S1-Ep4: Heat Chamber Video duration: 1:46 minutes

      Alex experiences intense heat when he endures a simulated heatwave Watch Britain's Most Extreme Weather Heat

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Weatherman Alex Beresford investigates why Britain's recent weather has been so severe and asks if we're facing the worst weather ever