"We, the undersigned, call upon [relevant authority/government/organization] to take immediate action towards [issue at hand]."

"It is imperative that immediate steps be taken to address the [issue at hand]."

"We respectfully request that [relevant authority/government/organization] implement measures to address the [issue at hand]."

"The [issue at hand] has reached crisis proportions and demands immediate attention."

"As concerned citizens/residents, we strongly urge [relevant authority/government/organization] to take action to resolve the [issue at hand]."

"We demand that [relevant authority/government/organization] prioritize the [issue at hand] and take all necessary measures to address it effectively."