Thuringia logs 47 forest fires through August as spruce cover declines to 31%

Above-average forest fire numbers

The official forest fire monitoring window in the German federal state of Thuringia opens on 1 March and concludes on 31 October. Between March and August 2026, state forestry services registered 47 forest fires across the region, which burned a collective area of 11.4 hectares. Historical records dating back to the start of systematic data collection in 1993 place the annual long-term average at 28 fires and 10 burned hectares per year. During the corresponding six-month period in 2025, authorities also recorded 47 separate fires, but those blazes consumed a total of 85.6 hectares. More than 80 hectares of that 2025 burned area resulted from a single large fire that spread across the Saalfelder Höhe.

Horst Sproßmann, the spokesperson for state forestry enterprise Thüringenforst, assessed the 2026 fire volume relative to historical baselines.

2026 can already be described as above average in terms of the number of forest fires from March to August.

Decline of spruce forest cover

Recent months in Thuringia have featured extended dry phases alongside periods of intense heat, compounding environmental stresses accumulated over several consecutive dry years. Norway spruce has emerged as the most vulnerable tree species under these shifting climatic conditions. Over the ten-year inventory window from 2012 to 2022, the proportion of spruce in Thuringian forests declined from 38% to 31% of total forest stock. State forestry officials formally identified spruce as the leading tree species losing ground to climate shifts across the state. In contrast, alternative native deciduous tree varieties have adapted more effectively to elevated temperatures and moisture deficits, including several oak species, winter linden, and field maple.

Cumulative stress on native tree species

Repeated drought periods have reduced the vitality of nearly every native tree species present in Thuringian woodlands. While spruce and European beech face the most severe physiological degradation across Thuringia and neighboring German states, Scots pine has also developed noticeable health issues in certain localities. Thüringenforst explained that multiple successive years of moisture deficits weaken tree biology so severely that a subsequent year with comparatively high rainfall cannot abruptly restore baseline health. Forest stands require extended recovery periods to regain resilience after surviving several years of prolonged drought.

Bark beetle dynamics and pest pressures

Sustained high summer temperatures directly alter the reproductive cycles and distribution of forest pests, particularly the spruce bark beetle. Warm weather enables the beetle to reproduce more rapidly, leading to faster population growth during the warmest months of the year. Simultaneously, spruce trees weakened by prolonged heat and water deficits cannot mount effective natural defenses against beetle infestations. Despite these elevated risk factors, the state forestry institution reported that the local bark beetle situation has eased across Thuringian forests. At the same time, forestry monitoring indicates that conditions regarding another forest pest remain comparatively tense.