Tropical Storm Dujuan is currently skirting the coast of Japan, and while it has politely declined to make a direct landfall, it still plans to leave its mark - like a houseguest who says they won't stay long but somehow rearranges your furniture anyway. Dujuan briefly achieved typhoon status on Friday before weakening back to a tropical storm on Sunday morning, but forecasters expect it to restrengthen into a typhoon by Tuesday morning. Sustained winds could reach 80mph (129km/h), with gusts approaching 100mph, which is the meteorological equivalent of being yelled at by a very angry hairdryer.

Although mainland Japan has dodged a direct hit, Dujuan's track takes it across the Izu Islands, where evacuation warnings are in place. Heavy rain, flooding and landslide alerts are widespread, with high waves adding another layer of threat to exposed coastal areas and islands. It's the kind of multi-hazard event that makes you appreciate the phrase "at least it's not a direct hit" while still eyeing the nearest elevated ground.

Some exceptional rainfall totals are expected, with about 200mm (7.9in) possible along the southern coasts of the Chubu and Kanto regions in just 24 hours - roughly equivalent to the average rainfall for the entire month of September, because why spread it out over 30 days when you can just dump it all at once? The Tokyo metropolitan area is among the areas facing the heaviest rain, with some models suggesting nearly 90mm could fall within six hours on Monday evening. Further south, the Izu peninsula could receive more than 80mm in just three hours - 38% of the month's usual rainfall in a single evening, which is the weather equivalent of eating your entire week's groceries in one sitting. Dujuan is expected to continue north-eastwards before dissipating in the north-west Pacific later this week, presumably after it's done making everyone's commute miserable.

Meanwhile, the Atlantic hurricane season remains unusually quiet, despite Tropical Storm Fay developing south-west of the Azores over the weekend. Fay is not expected to strengthen further, which extends the record for the latest first hurricane to form in a hurricane season during the satellite era. The previous date record was 11 September, set in 2002 with Hurricane Gustav and equalled in 2013 with Hurricane Humberto. So if you're keeping score at home, the Atlantic is currently behaving like a student who hasn't started the assignment but insists they work better under pressure.

In a plot twist nobody asked for, south-west Europe may get one last taste of summer with a blast of heat this week. Temperatures across Spain and Portugal will rise significantly above the monthly norm, to the low to mid 30s celsius. Even in north-west Spain, in Santiago de Compostela highs could reach about 35C (95F) on Tuesday, about 12C above the typical daytime high. Heading into the weekend, warmth will spread into central Europe, but most likely with less intensity than earlier in the week across the Iberian peninsula. So pack your sunscreen and your umbrella, because apparently we're doing both now.