And the fourth angel poured out his vial upon the sun; and power was given unto him to scorch men with fire. 9 And men were scorched with great heat, and blasphemed the name of God, which hath power over these plagues: and they repented not to give him glory. Rev 16:8-9 (KJV)
Remember the water you should have harvested? Yup. You need it now also! Don’t let anyone know you’ve got it except other Christians – people will kill you to get it.
Get underground. I can’t think of too many other ways to survive this. If you’re paying attention, by now you’re at Petra. If you couldn’t make it by now, that dig out shelter I recommended… you need it now.
Getting underground gets you cooler. Dwelling in a cave is even better, but hey… it’s just not something you find in every town and city is a nice, cool cave.
You should not go outside at all during this.