The Chinook salmon run in the Napanee River is being impacted by unusually low water levels.

A temperature of 29.8 °C was recorded at Egilsstaðir Airport on August 16, 2025, marking the highest August temperature measured in Iceland this century.

Stockholm Vatten och Avfall warns that unusually high water temperatures in Lake Mälaren have strained water production, urging residents and businesses across multiple municipalities to conserve tap water immediately.

Tana and the rest of Finnmark are experiencing an unusual late-summer heat wave with temperatures around 30 °C, leading locals to swim in the warmed Tanaelva.

The Lenangsstraumen weather station in Lyngen, Nord-Troms recorded a tropical night with a minimum temperature of 20.1 °C overnight, part of an ongoing heat spell across Northern Norway.

Five locations in Finnmark recorded temperatures above 30 °C on Saturday, an unusually high heat for the region.

Sea surface temperatures around the UK have been the warmest start to the year on record, driving unusual species like bluefin tuna, octopus and mauve stinger jellyfish into British and Irish waters. Irish waters have cooled since a May marine heatwave but remain above average in the east and south.

Finland recorded its 19th straight day of 30 °C temperatures, breaking the previous record of 13 days set in 1972, as the ongoing heatwave continues across the country.

Five communities in British Columbia’s Interior, including Prince George, recorded their hottest July 30 on record, with Prince George narrowly surpassing a 105-year-old temperature record.

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.

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.

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.

The Finnish Meteorological Institute reports that July 2025 was exceptionally warm across Finland, with Lapland’s Ylitornio experiencing a record 26-day heatwave.

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.

July 2025 tied with 1933 as Iceland’s warmest July on record, with northeast and east regions averaging up to 14.2 °C and widespread 20 °C days across the country.

Norrbotten experienced one of its longest recorded heatwaves, with temperatures exceeding 25 °C for over two weeks and setting century-old records in Haparanda and Jokkmokk, according to SMHI.

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.

Some temperatures in the eastern Interior hit 90 degrees Sunday, as ex-Typhoon Ampil moves toward Western Alaska this week.