Scientists are warning that the El Nino phenomenon has arrived and could reach historic intensity, potentially leading to extreme climate conditions. The event may bring significant weather impacts, possibly including a wet and hot winter in some regions, and could contribute to a record hot year globally. The severity of the El Nino's effects is still being assessed, with some outlets suggesting it could be the strongest in over a century, while others describe it as a potential "super" or even "godzilla" event.