Recent heat waves have warmed Lapland’s rivers and lakes, leading Metsähallitus to suspend fishing permits and advise against salmonid fishing in the warm waters.

SOS Alarm in Norrbotten, Sweden is experiencing extreme call volumes from approximately 20 fires triggered by lightning in a heatwave, resulting in delayed emergency response times.

A persistent heatwave in Finland is fueling dense blue-green algae blooms in the Baltic Sea’s Gulf of Finland and Archipelago Sea, with freshwater sightings remaining stable.

Grong and Namsskogan in Trøndelag have logged 13 straight days above 30 °C, breaking the 43-year Nesbyen record, amid a nationwide heatwave.

During a prolonged heatwave with temperatures above 30°C (86 F) in Vindelfjällen, hikers on Kungsleden are shifting their treks to early morning and nighttime to escape daytime heat.

Over the weekend, train traffic on the Iron Ore Line was halted for nearly 24 hours due to sun-induced track kinks (“solkurvor”), a phenomenon that Trafikverket warns could recur on hot days.

Norrbotten has experienced a persistent heat wave with temperatures above 30 °C for two weeks, and SMHI forecasts 32 °C in Luleå on Wednesday. Meteorologist Linus Karlsson attributes the prolonged heat to stable high pressure, with warmth expected to continue through the week.

Warm, dry weekend conditions in Manitoba increased wildfire behaviour across nearly all active blazes, prompting evacuations, air quality warnings and challenges for aerial suppression.

Temperatures in Rovaniemi exceeded 30 °C this week, drawing coverage from Reuters and CNN as the Finnish Meteorological Institute warned that Lapland’s all-time heat record could be broken.

Lake and river surface waters in Lapland have warmed rapidly due to recent heatwaves, reaching up to 5°C above average and attracting more beach visitors than usual.

This marks the first summer that the weather service in Alaska has issued heat advisories to share with residents what they can do to mitigate hot conditions. Climate scientists say those notices are likely to become common.

Sea surface temperatures off Norway have reached 22–23 °C, at least five degrees above normal, marking a marine heatwave that risks stressing marine life and intensifying extreme weather.

DMI reports that six record‐high spring temperatures were set across Greenland in spring 2025, including an unprecedented average of –24.8 °C at Summit Station and a 16.9 °C high in Nuuk.

The National Weather Service has issued its first-ever heat advisory for Alaska, covering Fairbanks as temperatures are expected to climb into the mid-80s this weekend.

A spring survey by the Icelandic Marine Research Institute recorded a sea surface temperature of 7.8 °C at Siglunes—3.2 °C above the 1991–2020 average—and found unusually warm, saline water flowing onto the northern continental shelf.

Reykjavík’s temperature yesterday came within half a degree of the city’s May record amid warm, dry, and bright conditions, with similar weather expected until rain arrives Thursday.

Winnipeg hit a record daytime high of 35.2 °C (95.36 F) on May 12, 2025, shattering a 67-year-old May 12 temperature record amid Canada’s first heat wave of the year, Environment and Climate Change Canada reports.

Flooding partially blocks traffic at the exit to the E4 highway near Ersnäs, south of Luleå. Unseasonably high temperatures have accelerated snowmelt, leading to overflow in the roadway.

Several seasonal ice roads in the Northwest Territories, including the Wekweeti and Dettah routes, have closed earlier than their long‐term averages, with additional roads on short notice closures due to warming temperatures.

A mini-heat wave struck Kodiak on Tuesday, breaking a temperature record that had stood for 70 years since 1954.