Temperatures This Coming Saturday Night

Wow, I can't believe that over night, Saturday night to Sunday, it's going to be in the low 30s!!! My poor hydrangea bushes suffered so badly by budding during the brief hot weather we had in early April. After that quick week, things turned so cold and most of the hydrangea's buds were killed. Now what used to be very full bushes are now just a straggly mess. After Saturday night, all three bushes probably be so pathetic looking.