Editor's note: See Axios' latest coverage on the heat wave.
The heat wave scorching much of Mexico, Texas and parts of New Mexico is forecast to worsen and last into the week of July 4, weather forecast models and National Weather Service (NWS) guidance show.
Why it matters: Extreme heat is the top weather-related killer in the U.S., and long-duration heat with little overnight relief makes this event particularly hazardous.
