Last week, much of the Midwest and eastern US experienced hazy skies and red sunsets. The cause was smoke transported from the Western US by the jet stream and spread as far as Boston and even Europe.
Understanding fire history is crucial to designing effective fire management in order to maintain biodiversity and support the livelihoods of people.
Unprecedented fires are devastating koalas along Australia's east coast. These sudden drops in population put the survivors at risk of inbreeding.
Australia is heading into a scorching summer, but the factors causing the hot and dry weather are expected to ease later in the season.
The same day all of New South Wales was declared in drought, the state's Rural Fire Service issued its earliest ever total fire bans.