Renewed war in Yemen and Houthi threats to Bab al-Mandeb collide with blackouts and deadly battery fires as the country's energy crisis deepens.

If the fighting in Yemen expands, and the Houthis try to block the Bab al-Mandeb, the world economy faces a new shock.

Saudi Arabia and Yemen's Houthis are nearing renewed conflict after recent attacks. Houthi fighters claimed large-scale strikes on Saudi Arabia, ending a four-year truce. The…