Good morning rain again and bumblebees

How long can bees go without food or collecting pollen ?? I ask because we're on our 5th constant day of rain or drizzle and plants that are usually full of bees are empty. Also butterflies can't fly in the rain i presume so how long can they last ??
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I had noticed a big dark mark in one thinking the flower was damaged or rotting. Went out in the morning to see a bumble hanging on. It had been horrible and windy during the night, I felt so bad I had not checked .
Brought it in and fed it, warmed and dried, it flew off home.
Warm fuzzy feeling