Reykjavík’s Health Inspection warns of high particulate matter near major roads in Reykjavík and Kópavogur during calm, dry weather, advising children, older adults, and people with respiratory illness to avoid busy roads and for the public to use alternatives to private cars.

A vivid red aurora was photographed over Selfoss around 2 a.m., a rare display caused by oxygen emissions high in the atmosphere. Photos also showed green fringes, with purple and pink hues possible when nitrogen is involved.