Some 420,000 visitors braved the heat at Expo site yesterday while the temperature soared to 35 degrees Celsius at the site.
Broadcasts and screens across the site reminded visitors to drink more water, take rests and not keep food in bags for too long.
Five medical service stations inside the Expo site received 432 visitors by 4pm yesterday. Up to 126 visitors suffered from sunstroke.
Visitors can ask for free sun cream and other medicines for sunstroke at the five medical stations around the Expo site which are open from 8am to 12am every day.
Visitors to the Expo site who feel uncomfortable can call for volunteers or dial 120 for ambulances to take them to the nearest medical station.
The Expo organizer has installed more electric fans and spraying systems across the site.
By 7pm, about 168,000 were on tour groups, and around 75,000 visitors used free tickets Shanghai government distributed to local residents.
By 7pm, a total of 38,177 tickets were sold on site by 8:30pm, with 16,843 night admissions.
By 7pm, Houtan Gate received about 78,000 visitors, Changqing Road 74,000, and Shangnan Road, Gaoke Road W. more than 113,000 in total.
By 5pm, 78 shows were staged, attracting 53,000 spectators. A total of 8,238 volunteers served on the site.
Experts advised older people, children and anyone with cardiovascular diseases not to come to the Expo when temperature was higher than 30 degrees Celsius.