Heatwave & humidity alerts issued for Mumbai, other parts of Maha for Oct 9 & 10. IMD has issued yellow alerts for "hot and humid conditions in isolated pockets" and "heat wave in isolated pockets" in Mumbai for October 9 and 10, respectively. Isolated pockets of Thane and Raigad may face hot and humid conditions, and Ratnagiri may see heat wave on Friday. Yellow alerts have been issued for Palghar, Thane, Raigad and Ratnagiri for.