Weight loss lowers risk in many ways. Most specifically, there is evidence that it significantly decreases your risk for heart disease. A recent study published in the Journal of Obesity showed that lowering BMI (Body Mass Index) also lowers your CRP (C-Reactive Protein). This is significant in that elevated CRP is a risk factor for heart disease and and heart attack.
If you are struggling with weight loss, see your doctor or a bariatrician (a specialty trained physician in weight management) to help with decreasing your BMI and lowering your risk for heart disease. A great source for finding a physician trained in medical weight management in your area can be found here.