Alex is a construction worker. They can not work while it rains, so today they ended there way very late to make up from the lost time last week.
We had to work today until very late since we didn't work last week. Why didn't you work last week? It was raining and we are working outside so we can't work when it rains. Oh, I see. Yep, just making up for lost time last week. I guess the rest of the week will be busy.