The smoke particles have already reached high into the atmosphere, so they won't cause health problems or unusual odours. The most colourful sunset is expected on Tuesday evening.
The institute started monitoring the cyanobacteria situation at the beginning of June and will continue until the end of September.
May was also exceptionally dry in many areas. According to the FMI, Savukoski, a village in eastern Lapland, recorded the most rainfall last month with 59.4 millimeters.
Early March's relatively mild start will get wetter in southern areas on Thursday, when a significant amount of rainfall is expected — with up to a full centimetre expected in western areas.
There were a total of 50 'heatwave' days in Finland this summer, when the temperature rose to above 25 degrees Celsius.
Anopheles daciae, commonly found in eastern Europe and the Balkan States and thought to be possible carriers of malaria, has been observed in several regions of Finland.
Finland is continuing to heat up this summer - and nearing the all-time heat record for June.
The condition of the lake isn’t very good and it has the typical problems with high nutrient levels and depleted oxygen.
It was the hottest summer in the 174-year history of weather records in Helsinki, and the second hottest in the 118-year history of the weather station in Sodankylä, Lapland.
June and July have been unusually warm in Finland.
Pori and Rovaniemi are among the areas to be worst affected in the coming decades, the Finnish Climate Change Panel warned in a new report.
