The half of Earth north of the equator, weather and seasons
Australia faces H5N1 spread among wildlife as Baudin Rocks mass mortality events are confirmed. Victoria and South Australia report dead and sick crested terns; New Zealand begins vaccination research to protect native birds; farmers strengthen biosecurity while communities assist with surveillance.
Forecasters have confirmed a very strong El Niño that has pushed Pacific sea-surface temperatures well beyond historical thresholds and is already altering global weather. The Met Office says the event is unprecedented in modern records; governments in Central and South America have declared alerts as droughts and extreme heat are damaging crops and water supplies now and into 2027.
Major US medical societies have issued unified guidance this week for flu, COVID-19 and RSV vaccines after the CDC’s advisory process has been disrupted. Updated COVID shots have FDA approval and manufacturers are shipping doses, but legal and policy disputes over federal recommendations continue to leave states and insurers uncertain about timing and coverage.
The world faces a record-breaking El Niño that is likely to bring extreme weather patterns. The UK government is advising households to prepare for supply disruptions, with Environment Secretary Angela Eagle highlighting the need for resilience as droughts, floods and cyber threats threaten food security.
El Niño is strengthening, with forecasts predicting historic intensity. Reports show drought in Central America’s Dry Corridor and a UK weather shift toward wetter, stormier conditions. Scientists warn impacts will extend into 2027 as temperatures rise globally and rainfall patterns shift.
The autumn equinox has arrived, marking astronomical autumn. The Sun crosses the celestial equator, creating roughly equal day and night. This year, the UK is experiencing varying daylight changes, with northern Scotland losing daylight faster. Weather is unsettled in parts of the UK this week, but milder conditions persist in the southeast before a rain system moves in.
El Ni no is strengthening and is forecast to peak in December 2026. Observations show record sea-surface temperatures with far-reaching impacts on heat, rainfall, and droughts across regions. Forecasts warn of continued extreme conditions into 2027 as nations prepare.
The Hunter Moon has lit up the night sky across the UK, with clear views possible as weather allows. The full Moon marks the 11th of 2026 and is the last before a sequence of four supermoons. Observers are advised to monitor forecasts for gaps in cloud cover.