As a heat wave hits multiple U.S. states, some areas are have been placed under extreme heat watches and warnings.

There's an "extreme" Level 4 heat warning for eight U.S. states on Sunday, June 22. The National Weather Service is warning eight U.S. states of extreme, dangerously high heat levels on Sunday. According to the Washington Post,

We're hitting peak heat wave today, with a handful of Michigan counties forecast to be the hottest places in the state.