According to Monarch Watch, the drought in Texas may produce one of the lowest--if not lowest--overwintering population of monarch butterflies in Mexico this year. The drought has lead to fewer nectar plants in the final pit stop / major gathering place for monarchs before they make their final leap to Mexico. So if you can, restrictions or not, water your flowers.
And while you're visiting Monarch Watch, get your garden up to speed and then have it certified as a Monarch Waystation.
But if you're in Minnesota this weekend, you can help Monarch offspring that will come back north next spring by attending the Minneapolis Monarch Festival. Make milkweed seed mudballs, enjoy 4 acres of restored prairie on Lake Nokomis, make me happy. (You can also come dressed as a monarch butterfly but, personally, I think you'd look terribly strange.)
Of course, according to the Nature Conservancy, in 90 years we might not have enough water to even take care of our own food sources. They've recently forecasted temperatures in the middle Great Plains to rise by as much or more than 10 degrees--with Kansas, Nebraska, and Iowa leading the pack. You can download a report on your state. Have fun.
A dry spring in Nebraska led to to a later and lesser appearance of Monarchs in my garden, at least that's my theory. I got home yesterday after a long weekend away and only found 5 caterpillars outside--4th and 5th instars. Last year, we were still plucking many younglings off the milkweed well into late September. Peak migration here is around September 15, so it does make some sense that there aren't many egg layers around.