According to Birding News, these Mississippi Kites have nested and it contains at least 1 chick. They are not releasing the location of the nest.
Just as a point of (maybe) interest, keeping raptor (falcon, hawk, eagle, osprey, owl & now kite) nest locations confidential has become a standard practice with our birding groups (and likely many others too) for the security of the birds. Unfortunately, not everyone has good intentions and sometimes there are just too many good intentioned folks wanting to get a look and the result can be the same.
Must admit I haven't gone out yet because I know there is quite a following already ... hopefully I'll get a peek when the new-ness of the discovery wears off a bit. Meantime, just going to enjoy vicariously through photos and reports from other birders. So not that different than many of our members here who are too far away to visit our birds in person