GlobalFest's opening night fireworks have been postponed because of an "ominous weather forecast."

Brazil's presentation, originally scheduled for Thursday, has been moved to Friday.

Environment Canada has forecast a 30 per cent chance of showers in the afternoon and early evening Thursday with risk of a thunderstorm.

No refunds or exchanges are being offered, but those who have bought tickets for the Aug. 18 show will be allowed to enter Elliston Park on Friday, the organization said in a statement.

GlobalFest, began in 2003 and is Calgary's very own international fireworks festival.

This year's presentation schedule is as follows: