The National Weather Service in Tulsa is advising of a 50% chance of thunderstorms in the afternoon heat. Any thunderstorm that does develop will have a chance to become severe.
There is also a risked of more sudden microburst down drafts. Those are caused when a thunderstorm collapses and winds gust out. When those winds hit the ground, they spread out and can cause wide spread damage.
While there is a chance of rain, do not expect it to be much cooler. The forecast high for the city of Tulsa is 99. It could be even hotter is some of the outlying areas. Click on the map for more detail.