Drinking water at night while on diuretics — is it actually a problem?

Dear Doctor Roach: I’m 74 years old, and I was diagnosed with congestive heart failure with a recent ejection fraction of 25%. My cardiologist has me taking empagliflozin (Jardiance) and furosemide (Lasix) daily. With moderate cardio exercise therapy every other day and two diuretics daily, my thirst runs rampant during the evenings, and I find myself drinking fluids to compensate. Am I nullifying the intended purpose of the diuretics? — D.P.