Image of the day

Southern California wildfires send smoke plumes over the Pacific

Earth Observation | Copernicus
Fires
Fires USA
Location: United States
Credit: European Union, Copernicus Sentinel-3 imagery

Fires burning across parts of southern California, United States, have affected Santa Rosa Island, off the coast of California, and inland communities near Simi Valley, a city north-west of Los Angeles.

On 15 May 2026, a wildfire broke out in the southern part of Santa Rosa Island, described as the largest blaze recorded on the island in modern history. Three days later, on 18 May 2026, a fire near Simi Valley prompted evacuation warnings.

This image, acquired on 18 May 2026 by one of the Copernicus Sentinel-3 satellites, shows active fires and smoke plumes over parts of southern California. Dense smoke extends more than 70 km south-westwards from Santa Rosa Island, while a smaller but clearly visible 50-km-long plume rises east of Oxnard near Simi Valley.

Copernicus satellite data support wildfire monitoring by helping authorities track fire extent, smoke dispersion, and fire impacts during ongoing wildfires.