Are you sure it's sunscald? It could also be blossom end rot. They look very similar, and on elongated peppers like yours, the BER doesn't usually appear right at the blossom.

Look at the pics here and see if they match.

If it's not BER and is sunscald, get some 3-foot bamboo stakes (my hardware store has packages of 50 for about $3) and a roll of burlap. Place the stakes around your bed, and drape the burlap over them. That will give sufficient cover to shade the peppers, but will also allow them sunlight.

Honestly, if your bed isn't in full sun, my money's on BER.

No I'm not sure. I found pictues of sunscald peppers that look like mine.
Spots are brown/tan with no black.
I don't think the spots were there a couple days ago so I thought it's our heat.
Could be BER.
I have 4' bamboo canes, and a couple of small rolls of black shadecloth that we were going to cover a canapy with.
I could use those to cover my bed.

I think you should hold off on covering the plants since they aren't in full sun to begin with and focus on treating blossom end rot. BER is largely a result of uneven moisture in the soil, which prevents the plants from getting the calcium they need. The combination of your recent heat wave, plus the fact that raised beds tend to dry out more quickly, could easily have led to the plants getting BER.

Wait for temperatures to normalize and I bet it will go away. In the meantime, mulching (or adding more mulch, if you already have some) would probably help a lot.

Thanks mudster, I'll try that.