"more severe impact" is a correct and usable phrase in written English.
You can use this phrase when you need to express that something has had a larger or greater effect than before. For example: "The rising sea levels have had a more severe impact on coastal communities than in the past."
As these years are important to financial and social health, keratoconus may have more severe impact on quality of life than would be expected given its clinical severity.
With the decline of agriculture, in recent decades, other factors have caused a more severe impact on the coastal landscapes.
But the summary of official BP modelling showing what it considers a worst-case scenario appears to suggest a much more severe impact over a much larger area.
Social disabilities due to mental disorders have a similar or even more severe impact on daily activities than some of the chronic, severe somatic disorders.
The numeric results show that shear deformation has a more severe impact on the structural responses of a variable stiffness than a constant stiffness plate.
The candidates are trying to define how they would tackle the sharp spiral upward in gasoline prices and its ever more severe impact on the economy, and so far their policy proposals are poles apart.
Although crown fires were less frequent (6% of burnt area), they exerted more severe impacts on carbon storage than ground fires.
The gender-differentiated and more severe impacts of armed conflict upon women and girls are well recognised by the international community, as demonstrated by UN Security Council Resolution (UNSCR) 1325 on Women, Peace and Security and subsequent resolutions.
Higher emissions would mean more warming and more severe impacts". Some of those changes are already evident: 2012 was by far the hottest year on record, fully a degree hotter than the last such record – an off-the-charts rate of increase.
Such a dramatic increase could pose heightened risk of birth defects [27, 28] and other reproductive problems [29], more severe impacts on aquatic ecosystems [30], and more frequent instances of off-target movement and damage to nearby crops and plants.
According to Huang et al. (2012) this is because residents who are closer to the hazards are more likely to personalize the risk by anticipating more severe impacts from those threats.
