Finnish authorities are investigating a gas leak outside of Finland, suspected to be caused by external activity, with both the security police and defense forces involved in the case.

Southern parts of the country can expect showers and thunderstorms on Tuesday, with more severe storms possibly hitting central areas by evening.

The last time the water levels were this high in some places was in the late 1990s or early 2000s. According to the Finnish Environment Institute (Syke), floodwaters will likely spill onto fields and roads in parts of southern and western Finland, but not into buildings.

The patient, who is receiving care at home, acquired the infection on a trip to Europe.

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.

Conditions will heat up with every passing day and weekend highs will be in the 20s across the country.

Finland says the low concentrations of radioactive material found in air samples pose no danger.

Estonian ship pilot Indrek Sulla on Tuesday morning sighted two dolphins who had likely wandered into Kopli Bay from the Atlantic.

The brown bears hibernated for only two months due to the warm winter conditions, according to zoo officials.

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.

Helsinki usually gets 70-80 millimetres of rain during August. Friday morning alone brought 56 mm of water to Kaisaniemi Park, where the Finnish Meteorological Institute (FMI) has a weather station.

The northwest coastal city of Oulu was one of several that had over 30-degree Celsius temperatures on Friday.

The Pallas's reed bunting has been sighted fewer than 10 times in Europe.

Forecasts indicate that ice cover will thin by dozens of centimetres all the way up to Lapland.

The warmest springtime temperature of the year so far is 14.1 degrees Celsius, and fires are popping up around the country.

The state rail company VR has said that it will substitute buses on some of the cancelled rail trips.

With current tropical conditions set to continue for another week, the situation is not likely to improve before the end of July or early August.

Not only is pollen is beginning to spread, but road gravel dust and studded tyres grinding the tarmac can also cause particulates that cause breathing difficulties. There are a few ways to deal with the dust, however.

Sea ice around Helsinki becomes more precarious as spring draws near.

Rain and rising temperatures have brought warnings of extremely slippery conditions in other areas.