THUNDER BAY -- It will be a sweltering show for those planning to attend the Thunder Bay Bluesfest, or any other outdoor activities this weekend.
Environment Canada has issued an extreme heat warning for Saturday and Sunday.
Temperatures are expected to climb to 29 degrees celcius during the day Saturday, feeling like 35 degrees Celcius.
Overnight temperatures aren't expected to drop past 20 degrees Celcius.
Sunday's forecast calls for extremely humid conditions, and a high chance of thunderstorms.
