Explainer: What is the 'Omega Block' causing Europe's intense heatwave? (opens original article in a new tab)

An omega block is sustaining an intense heatwave in Western Europe, leading to over 40 deaths in France.

• An omega block is a weather pattern causing an intense heatwave in Western Europe.
• The heatwave has resulted in over 40 deaths in France.
• The omega block is sustaining the extreme heat conditions.