The phrase "are severe because of" is correct and usable in written English.
It can be used to explain the reason for the severity of a situation or condition.
Example: "The consequences of climate change are severe because of rising global temperatures and extreme weather events."
Alternatives: "are serious due to" or "are critical as a result of".
Although the New York area is not as likely to have as significant an earthquake as the one in Japan, the risks are severe because of Indian Point's proximity to so many people.
The effects of Rician noise on DT MRI, however, are severe because of the inherent nature of the process--higher tissue anisotropy produces progressively lower intensities in diffusion-weighted images that, in turn, are more susceptible to Rician noise.
The withdrawals from Subutex and Suboxone are severe because of the long half-life of the drug and the withdrawal syndrome is long and drawn out.
This subtype of JRA may be severe, because of both its multiple joint involvement and its capacity to progress rapidly over time.
It should be realised that this reduction was severe because of the dramatic health status of the mice at this time point, therefore the effect of the nutritional ingredients was only determined in a pre-cachectic state.
All ADRs were severe because of the hospital admission, but they were clinically mild, not resulting in permanent harm to the patient, significant hemodynamic instability or (in directly to patient death.
A patient who experiences hypoglycemia for the first time will often refer to that event as being "severe" because of fears that they have become powerless to prevent their own morbidity without outside assistance.
In pharmaceutical applications the penalties are severe, because 93 97% of all drug projects are cancelled never to reach the clinic, often at a late stage of development.
The effects on the OXPHOS process were severe probably because of the lack of functional compensation by other members of this family of coactivators, as suspected following studies on PGC-1α and PGC-1β null mice [30], [31].
"Because of this, there are severe delays.
There is an increasing risk that the downturn could be severe, not least because of the fragility of Britain's mortgage lenders as the housing market subsides.
