Watch Euronews live stream
At least 31 people are known to have died in the western states of California, Oregon, and Washington.
A large fire has broken out in the Lebanese capital Beirut - more than a month after a massive explosion destroyed part of the city.
Skies were so dark at times that it appeared more night than day.
Thousands of migrants slept on the streets on the Greek island of Lesbos after being evacuated from their camp as fires broke out early on Wednesday.
Sri Lankan officials have warned massive environmental damage is possible if the MT New Diamond vessel leaks or explodes.
One of the trains was loaded with dangerous materials, including flammable gas and a corrosive substance.
A year ago, "Fire Day," a day to intentionally light fires, sparked international concern when the number of forest fires in the Novo Progresso region, a city in the Amazon region of Pará, spiked massively.
Authorities said the fire might have been set deliberately. One person has been arrested in connection with the incident.
At least 11 people have been killed in a fire in an apartment building in the northeastern Czech Republic, police and firefighters said Saturday.
Firefighters continued to fight fires in the wetlands of the Paraná River Delta, destroying habitats in an area close to 200 square miles.
DISARM is the fire-modelling system giving southern European nations a fighting chance against blazes like the one that caused the Mati tragedy in Greece two years ago.
Fire fighters tend to the Cathedral of Saint-Pierre-et-Saint-Paul in Nantes, western France, after a fire destroyed parts of the church including the great organ.
The 17-year-old was doused in petrol and set alight at her home in south-west Romania last Saturday, say prosecutors.
First responders rushed to face a major fire that broke out in a residential skyscraper in Sharjah on May 5.