The phrase "are heightened when the" is correct and usable in written English.
It can be used in contexts where you want to describe an increase or intensification of something that occurs under certain conditions.
Example: "The emotions of the characters are heightened when the stakes are raised in the story."
Alternatives: "are intensified when the" or "are amplified when the".
However, the majority contends that separation of powers concerns are heightened when the president's powers are exercised in the "domestic sphere" and that Congress, not the executive, controls utilization of war powers when invoked as an instrument of domestic policy.
Thus, biosecurity concerns are heightened when the more extreme depiction of synthetic biology's ability to engineer biology is emphasised.
Suspicions were heightened when the Lujiang government first asserted that the images had been altered with Photoshop, then said the people in them were not county officials, period.
The sense of fracture was heightened when the police insisted he invent an alias so he could write checks without being identified.
Sheerman said his concerns were heightened when the only member to oppose the report was Graham Stuart, one three Conservatives on the committee.
Anxieties about Disney's feature film business were heightened when the film group's chairman, Peter Schneider, resigned two weeks ago, raising questions about who would replace him.
The importance of the private cases was heightened when the United States Court of Appeals for the District of Columbia Circuit set tough standards for determining when the government could break up an antitrust violator in the fast-changing businesses like information technology.
While the fence is supposed to be a temporary measure, fears that the crisis could be prolonged were heightened when the government signalled its intent to fence its entire 670km border with Croatia in December.
Private investment, the authors note, rises in line with the new, elevated level of GDP after a burst of public investment.Debt becomes themThe stimulus is heightened when the investment is financed by borrowing: an increase in public investment equivalent to 1% of GDP boosts GDP by 0.9 points in the first year and 2.9 points in the fourth.
Teams of outreach workers checked on street dwellers every two hours under the department's "Code Blue" procedure, which goes into effect when the temperature or wind chill drops below freezing and is heightened when the readings fall below 20 degrees, according to Mr. Diamond.
The buzz was heightened when the infamously glacial British-born editor of American Vogue, Anna Wintour, showed up.
