More than just fireworks are exploding as the Fourth of July holiday weekend approaches — namely temperatures amid a dangerous heat wave. Is your AC ready for the challenge? As @USA TODAY reports, a massive heat dome is spreading across the U.S., bringing high temperatures in the 90s from the Plains states, through the Midwest and all the way to the East over the next several days. Meanwhile, from Texas to the Mid-South to the Gulf Coast, heat indices could reach 110 degrees. If your home’s air conditioning goes kaput amid this swampy-and-sweltering summer weather, do you know what to do? Watch and learn as Lauren and @Matt Schmitz show you step-by-step how to build your own DIY AC that’ll help keep you cool while you wait for the HVAC repair technician to show up… #airconditioner #airconditioning #heatwave #homeowner #fyp