Zone of high pressure sandwiched between two low-pressure areas is causing abnormal conditions across Europe
An unusual omega weather system – in which a zone of high pressure is sandwiched between two areas of low pressure – is being blamed for both the unseasonal heatwave in the UK and the catastrophic flooding in Bulgaria, Greece and Turkey.
At least 12 people have died in the three countries as torrential rainstorms caused flash floods, sweeping away bridges and inundating streets, homes and public buildings.
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