Try internshala sorting feature to get internship of the desired location
Try UAS for good internship
Online search is your only resort right now. Try LinkedIn and also keep looking through newspaper there are many opportunities. You could also go on sites of the companies you prefer working with. If a company has any job vacancy it internship spot open , it is there on the careers tab on their website
Checkout internshala and apply to as many internships as you can to increase your chances.
You can checkout Internshala
You can look at internshala , you should also follow some of the companies that you would like to work with on instagram so that if they are hiring people for summer internship you can apply.
Try your luck on internshala, LinkedIn or use some of your friend's or family's contacts
You can check over linkedin and Internshala