It's a case of wait and see. Expect quite a bit of die backs and shrivelled stems. - however gently scrape the bark off the base of the ivy stem. If it appears fresh/green there's a good chance of recover. The ivy will rebound from it's root base. Don't overwater, just be vigilant and let it recover. Absolutely no fertilizers. Good luck.

Ianna

Also, check for webbing on the leaves. They're susceptible to spider mites, who like the dry conditions you describe.

Thank you all for the helpful responses. I tried scraping the bark of the base and one of the stems looks still viable. Here's hoping!!