Eighteen patients have died in the last 24 hours at the Chhatrapati Shivaji Maharaj Hospital in Kalwa in Thane, civic commissioner Abhijit Bangar said on Sunday. These comprise 10 women and eight men, of which six are from Thane city, four from Kalyan, three from Sahapur, one each from Bhiwandi, Ulhasnagar and Govandi (in Mumbai), one patient is from some other place and and one is unidentified, he said.