Check coolant level. If that's ok then make sure nothing is blocking the radiator or condenser. You may also have a sticking thermostat.If you don't work on your car then use this link to find a good shop near you.
https://repairpal.com/repair-shops
Alex
RepairPal Certified shops can diagnose and repair your 1995 Buick Century. They provide transparent pricing with a minimum 12-month or 12,000-mile warranty on repairs and services.