"severe extent" is correct and usable in written English.
You can use it to refer to the significant magnitude of something, especially when that magnitude is extreme or overwhelming. For example: "The destruction from the recent hurricane was of a severe extent."
A yearlong investigation of the Gowanus Canal in preparation for its cleanup under the federal Superfund program has confirmed the severe extent of its contamination and the threat it poses to public health, particularly for people who eat fish from it or have repeated contact with its water or sediment.
In general, the presence of corrosion damage reduced the fatigue lives of components to a severe extent.
Treatment with melatonin significantly attenuated the increased level of serum aminotransferase, reduced the severe extent of hepatic cell damage, steatosis and the immigration of inflammatory cells, but had no effects on hepatic expression of lipogenic genes.
"We are effectively bringing back emergency law, to a more severe extent, in a civilian cloak," the lawyer said.
Although full damage reports were never released, damages were estimated at ₱ 4.3 million (US $73,000) and of "severe extent".
YouTube videos posted online by Rodger in the days before the shooting, as well as a lengthy written manifesto that has been attributed to him, reveal the "severe extent" to which the young man was "disturbed," authorities said.
A pathologist, blinded to the clinical data, scored the lesions from 0 2 (absent, mild/moderate and severe): 1) extent of honeycomb; 2) hyperplasia of smooth muscle cells; 3) hypertensive changes; 4) extent of fibrosis 5) extent of interstitial inflammation; 6) hyperplasia of type 2 cells.
But unfortunately, these low-grade fuels always introduce harsh service environment within the CFB boilers and consequently result in severe degradation extent on relevant equipments, especially the high-temperature sulfur corrosion.
Thus, erosion will be more severe to the extent that soils are more porous and sandier, fields are more sloped and hold less vegetation as well as in those locations where precipitations are more "aggressive".
The predictions of indirect malaria mortality, and to a lesser extent, severe episodes rely on age-dependent co-morbidity functions.
Cases may be graded as mild, moderate, or severe, depending the extent of skin disease.
