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This link will take you to a page of articles discussing bloom problems with squash: http://www.google.com/cse?cx=012078378210706707791%3Af1h5n_k1r5e&ie=UTF-8&q=squash+blossoms+falling+off&oq=squa&gs_l=partner.3.0.0l10.159431.160479.0.164355.4.2.0.2.2.0.293.416.0j1j1.2.0.gsnos%2Cn%3D13.1.0.0.3445j6288609j5..1ac.1._o723Bb2KkI#gsc.tab=0&gsc.q=squash%20blossoms%20falling%20off&gsc.page=1

I am not quite certain it is the same plant, but they may have been picturing a birdhouse squash plant. They have lovely large leaves.

Are they wilting too? If so, this could be the onset of bacterail wilt, which is detrimental to both squash and cucumbers. This article provides common reasons for yellowing of squash plants: https://www.gardeningknowhow.com/edible/vegetables/squash/why-squash-leaves-turn-yellow.htm Mosaic is another possibility that could affect these plants: https://www.gardeningknowhow.com/edible/vegetables/cucumber/cucumber-mosaic-virus.htm

Generally, they will produce mostly male (non-fruiting) blossoms early in the season and will gradually start to produce more female blossoms as the season progresses. Give it some time and you will see it start fruiting.

The signs are pretty much the same regardless of the plant. This article should help: https://www.gardeningknowhow.com/plant-problems/environmental/signs-of-plants-affected-by-too-much-water.htm

You may be seeing squash wilt: https://www.gardeningknowhow.com/edible/vegetables/squash/signs-and-treatments-of-squash-wilt.htm
or the effects of an insect such as thrips or aphids. You can take some leaf samples to the Extension Service for analysis; this link will help you find one: https://www.gardeningknowhow.com/extension-search/
but in the meantime, you might try a simple home remedy such as neem oil to control whatever bug is molesting your squash: https://www.gardeningknowhow.com/problems/pests/neem-oil-uses.htm