A brown bear was filmed running through downtown Loimaa after emerging from the Loimijoki River, one of several recent sightings in Southwest Finland this spring.

A weather station in Vihti, Southern Finland recorded an unprecedented 18°C on Wednesday, marking the highest reading for this time of year in recorded Finnish history, though colder weather is forecast later in the week.

Early sightings of migratory birds in southwest Finland, including bean and greylag geese, suggest milder winter conditions and highlight the impact of climate change on traditional migratory patterns.

Local fire chief Clas Tallberg stated that fish washed up on Hanko's shore showed injuries suggesting they were crushed by a fishing trawler's net, leading to a mass die-off of brisling sardines. Meanwhile, volunteers are cleaning up white clumps on the beach believed to be vessel wash water.

Finnish fuel firm Neste confirmed that white clumps on Hanko's shore likely resulted from wash water containing used oils from one of its vessels, prompting cleanup efforts and an ongoing investigation.

The sale of fishing permits has been suspended for two sites where water temperatures have risen to critically high levels, especially for salmon.

One spark was all it took. The driver of the forest harvester was working a logging site at Renko in Kanta-Häme. The grapple of the machine hit a stone, throwing a spark that set the underbrush ablaze.

Finland is experiencing warm and sunny weather with temperatures ranging between 20 and 25 degrees Celsius, and an advisory for strong ultraviolet radiation has been issued for the south and southwest.

The last time Finland had this much sunshine in March was nearly a decade ago, in 2013. High pressure typically brings clear skies, and this was also the case last month in Finland.

For example, Espoo's district of Nuuksio recorded 24.8 degrees celsius (77 F) on Tuesday. Many people across the country took advantage of the warm temperatures and headed outdoors with some opting to go swimming in lakes or pools.

Strong winds have created a picturesque wall of ice on the shore of Lake Pyhäjärv. "This often happens at this time of year on the shores of larger lakes and on the sea shore," Huutonen said, adding that there were gale force winds in the area over the weekend.

The H5N8 virus was detected in sick and injured birds in February and early March this year, including in a swan found dead in Helsinki's Eläintarhanlahti park and a goshawk sent to Korkeasaari Wildlife Hospital from Kumpula. Several birds infected with avian influenza have been found in Uusimaa this winter.

Finland is emerging from a deep freeze, giving way to milder temperatures and more snow. On Saturday three people in Helsinki fell through the ice at two different locations within the same 15-minute period.

Ascension Thursday, a Finnish holiday, was unforgettable for Keeri Sjöblom, 13, who lives in Kimitoön, a maritime municipality in southwest Finland.

The cherry blossoms along the Aura riverbank are a huge draw for tourists and photo enthusiasts every year around mid-May. The city's head gardener said he was amazed by the sight of the flowers budding this time of year.

According to Simo Laine, head horticulturalist at botanical garden in Turku, southwest Finland, it could well be the first time that the blooms have made an appearance in the country as early as January.

Sipilä said that during his 40 years working for state-owned parks and wildlife management agency Metsähallitus, he has never seen such poor ice conditions in January.

The incidence of ticks at all of Turku University’s research sites in Turku as well as in Helsinki has risen over the past 20 years, and they can still active into the fall, even after periods of freezing weather. Southwestern Finland and Uusimaa have reported 29 cases of tick-borne encephalitis and some 1,500 people have contracted Lyme disease, an illness caused by ticks carrying Borrelia burgdorferi.

Various species can be spotted in different parts of the country till early October due to warm weather in the south.

A total of 140 crashes and other accidents involving elk have been reported in the last week alone, police said, especially in the area around Pyhäjärvi lake near the town of Säkylä in the southwest of Finland.