"Century" plants about to bloom

There are a number of examples of the Agave americana, more commonly known as "century plant", around our community. 

The common name "century plant" stems from its monocarpic nature of flowering only once at the end of its long life. After flowering, the plant dies but produces adventitious shoots from the base, allowing its growth to continue. Although it is called the century plant, it typically lives only 10 to 30 years. It has a spread around 6–10 ft with gray-green leaves measuring 3–5 ft in length, each with a prickly margin and a heavy spike at the tip that can pierce deeply. Towards the end of its life, the plant produces a tall, branched stalk adorned with yellow blossoms, which can reach a height of 25–30 ft. (from https://en.wikipedia.org/wiki/Agave_americana)

The "adventitious shoots" are also called "pups". 

One of the bloom stalks outside one of our buildings with meeting space.

Close-up on the lower part of the bloom stalk where the blooms seem to be coming out.

I had heard from some other folks in our community that they grow to a certain age, bloom, and die, but... so many of the plants in our community have bloom stalks up right now, I didn't think that was the case. Of course, they *could* have all been planted at about the same time. The community is 55 years old, this side of the community was the last to be developed, so maybe plantings on this side are 40ish years old? And maybe this is the second round and the plants we see now are "pups" of an earlier bloom?

I haven't found anything on the web that substantiates that they bloom at a certain age. I think it is more likely related to being in drought conditions for a few years, and then the relatively wet summer we had last year, followed by a warm and dryer winter may have sparked their flowering. 

At any rate, we are looking forward to them fully flowering!