THE BLOG

Time To Talk About The Weather

24/07/2017 13:06
Rafael Marchante / Reuters

On the 18th of July 2017, a four foot wall of water rushed through the seaside village of Coverack wrecking homes and businesses, just at the start of the crucial holiday period. Film footage showing an elderly couple rescued from their home by a helicopter was beamed around the world and reminiscent of similar pictures taken at Boscastle when a flash flood destroyed the village.

In Cornwall in 2004, when emergency services were scrambled to evacuate Boscastle, the devastation was so great that the call went out to 'save as many as you can'. Miraculously, in both incidents, no one was severely injured or died but many people lost their homes and livelihoods.

Stories of neighbours coming out to help, valiant fire and coastguard crews and teams of council and Environment Agency workers who are entrusted with the clean-up operation show the best of British kindness and community resilience. But as storms and floods continue to feature in weather forecasts there is a wider point that is crucially absent from public debate: The significant increase in extreme weather events and the causes of them.

British summers are transforming from mild temperate affairs into mercury rising heatwaves. Whilst this is great if you are on holiday, extreme heat can be disruptive and dangerous. From melting tarmac to heat stroke, the impacts of excessive heat on human health, animals and infrastructure is severe.

Excessive heat also causes thunderstorms and flash floods, as the intense heat creates instability in the atmosphere when warm air mixes with the cold air above. In addition, in hot weather clouds can hold more water vapour so when the heavens open there is often a torrent of rain.

The irony is that in dry summer months, rain is desperately needed but the soil is so hard that the land cannot absorb most of this downpour. Therefore, the large volume of water rapidly runs off the slopes overflowing drains and rivers. Flash flooding occurs particularly in narrow, steep valleys as the water is funnelled down to the sea like at Coverack.

Sadly, predicting where these thunderstorms will strike is almost impossible and the lag time between deluge and destruction is tiny. Therefore the window of opportunity to warn residents so they can protect themselves is small. Flash floods are destructive and the frequency and intensity of them is increasing and this is the discussion that is missing from news reports on weather events.

Nearly every year the UK achieves 'record breaking' temperatures due to climate change. Greenhouse gases, like carbon dioxide, trap the sun's radiation, which is why average temperatures are increasing year on year. The longer we rely on burning oil and gas for energy, the warmer the world becomes and therefore, the more frequent and intense extreme weather events become.

Most major towns and cities are located next to rivers or seas so the number of people and properties at risk of flooding is immense. And it is not just flooding. Recently, excess heat fanned the flames of wild fires that killed over 60 people in Portugal and led to the evacuation, by sea, of an entire holiday village in Sicily. Like a mini Dunkirk, the local mayor appealed, through Facebook, for help from anyone with safe and reliable boats to rescue the women and children from the beach first to escape the advancing flames.

The good news is we know the solution to this problem. We urgently need to switch to clean energy like solar and wind to reduce the severity of global warming. The scale of the transition required is significant and increasingly corporates are leading the way. The fashion brand Burberry recently announced they will source all their electricity from renewable energy and the first showroom dedicated to electric vehicles featuring BMW and Nissan has opened in Milton Keynes.

Meanwhile, the Government has been noticeable by its absence in the clean energy debate. But in a positive move, the Climate Minister Claire Perry promised a clean growth plan for the UK in the autumn. Hopefully we can and will avoid the worst scenarios of excessive heat, droughts and floods. But, the first step is for us Brits to start talking about the weird weather and then how we can fix the problem.

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