The phrase "are rising concerns" is correct and usable in written English.
It can be used when discussing issues or problems that are becoming more significant or prevalent over time.
Example: "In recent months, there are rising concerns about the impact of climate change on global food security."
Alternatives: "growing concerns" or "increasing worries".
Falling temperatures and precipitation are rising concerns as the N.F.L. heads toward the playoffs.
There are rising concerns over the humanitarian situation in Sirte, which is believed to be rapidly deteriorating.
Still, there are rising concerns both inside Malaysia and among foreign investors about the reform movement and the effect it could have on political and economic opening.
"There are rising concerns about corruption and cronyism in South Africa and it will make it increasingly difficult not just for journalists but also for community activists, lawyers and others to access the kind of information that they need to expose that kind of wrongdoing.
With the increasing amount and types of anthropogenic compounds being released into water, there are rising concerns of undetected toxicity.
However, there are rising concerns about the ability of aspen to persist in portions of its range, based on bioclimatic modeling, physiological thresholds and mortality surveys.
There were rising concerns that a desperate Iraqi government would use chemical or biological weapons.
Another factor adding to the woes of Japanese power companies has been rising concerns about the safety of nuclear energy.
The second part of the equation is rising concerns over the mythical "soft online ad market".
There have been rising concerns about micro-pollutants that are not efficiently removed by conventional wastewater treatment plants.
One is rising concerns over a resurgent Hindu right, exemplified by the RSS, the BJP's ideological mentor, and a bunch of hardline outfits who believe in establishing Hindutva (Hindu-ness) as a superior political ideology.
