Hurricane Ida: more than 1m without power as New Orleans assesses damage

Crews using helicopters and airboats conduct search and rescue missions after at least two people killed

• Hurricane Ida's rampage through Louisiana - in pictures

More than 1 million homes and businesses remained without power in and around New Orleans on Monday as residents and authorities began to assess catastrophic" damage from Hurricane Ida, a 150mph monster storm that was the most powerful ever to hit Louisiana.

Related: New Orleans battered by Hurricane Ida as storm claims first victim in Louisiana