Storms will build with the afternoon heat in the DC area on Sunday and could overlap with the UFC fights.

The White House is set to host a rare outdoor UFC fight card on Sunday, but swampy heat has the NWS warning of “hazardous” conditions.

“I can’t rule out a shower or a storm, but I don’t think it's going to be an issue,” said Topper Shutt, chief meteorologist for WUSA 9.

The UFC fighters won’t be the only bloodthirsty ones at the event.