The ambient temperature range of 28.91 to 34.20℃ and the relative humidity values of 51.25 to 84.74% were obtained in the poultry house during the experimental period. The performance characteristics of heat stressed broiler chickens given water supplemented with electrolytes, ascorbic acid or combination at the starter phase (week 1 to 4) is presented in Table 2. Significant variations (p < 0.05) were observed in the feed intake (FI) and weight gain (WG) at the starter phase among treatments. Birds on T7 (sodium bicarbonate + ascorbic acid) had higher FI and WG which differ significantly (p < 0.05) from those on treatments 1, 4 and 6. However, feed conversion ratio (FCR) showed no significant variations among treatments.