It would be really dangerous to you to lose that much weight
, ie 15 lbs
2 weeks. A good amount of weight
is about 2 lbs per week.
The middle of August is about 4 weeks away. Even in 4 weeks, unless
you go on what I would call a drastic diet or a starvation diet which would
probably put your body in shock, you can't lose 15 lbs in a healthy way.
Some people might think that if you drastically reduce your calorie
intake, the weight will just fall off you. This is not true.