The phrase "a dangerous increase" is correct and usable in written English.
It can be used to describe a rise in something that poses a threat or risk, such as crime rates, pollution levels, or health issues.
Example: "The report highlighted a dangerous increase in the number of wildfires due to climate change."
Alternatives: "a perilous rise" or "a threatening surge".
This has already resulted in a dangerous increase of tension in the region.
In Haig's view, maternal diabetes and pre-eclampsia, a dangerous increase in blood pressure, reflect this tussle for survival.
As governor, Mr. Bush took the conventional conservative position that hate crimes legislation could lead to a dangerous increase in prosecutorial power.
If "the war on terror" is the justification, then this administration and Congress have initiated a dangerous increase in presidential powers that is open-ended.
Turkey's downing of a fighter jet on Tuesday is thought to be the first time a Nato member has shot down a Russian aircraft since the Cold War, risking a dangerous increase in international tensions.
In its reluctance to criticize the Israeli raid, the American stance was at odds with that of most of Europe and the Arab world, whose leaders roundly condemned what they called a dangerous increase in tensions in the Middle East by Israel.
In the United States, President Obama's plan to reduce deficits gradually over the next five years is a good tradeoff between stemming a potentially dangerous increase in the national debt and preserving the economic recovery.
President Obama's plan to reduce deficits gradually over the next five years is a good trade-off between stemming a potentially dangerous increase in the national debt and preserving the economic recovery.
The head of the United Nations climate science panel has declared it is still possible to avoid a dangerous 2C increase in global warming – despite more than a dozen record hot years since 2000.
During general anaesthesia of such patients, variations in cardiac and pulmonary flows may lead to dangerous increase or decrease of systemic or pulmonary pressures.
But if adjacent trains tilt too far, the probability of a dangerous accident increases dramatically.
