then water it more ...

was it in shade at the nursery ... and have you put it in full sun ...

try to site it in lots of sun.. but protected during the hottest part of the day ... say.. 1 to 6 pm or so... if you can ...

you may need to water it morning and night ...

ken

I read that it is drought tolerant...which makes me think too much water might be giving it root rot. Probably not the case if it's experiencing 100+ degree weather...but it's something to consider. You could dig around and check the roots.

Wow...Lantanas typically require very little water and take full sun and 100F with abandon.
Something is very wrong.....overwatering is probably more likely than underwatering, unless your idea of watering is pouring a cup or two on the soil.

That is a pretty large plant in a fairly small pot. There is no way you overwatered in 100 degree heat for a week and caused the damage that way. My guess is its drying out quickly due to being pot bound and it now has some crispy damaged leaves from being too dry and/or exposed to too much direct intense sun along with reflected heat off the pavers since being moved from a less torrid situation causing shock. The roots are probably fine.

It is too dry. You can see space between the growing medium and the pot -- indicating the growing medium is dry as a bone. Best thing to do is to soak it in a bucket or large bowl of water, letting the medium wick up the water from underneath; this will fully saturate it. If you water from above when the medium is that dry, it will just run right through and out the bottom of the pot.

This is why I replant stuff that is replanted in straight potting mix (I make about a 50:50 mix of potting mix and high quality topsoil) - pure potting soil dries out in the blink of an eye, I have neither the time nor the desire to be a slave to my potted plants.

Hopefully the plant will be fine with a good from-below soaking; you will have to keep it well-watered after that, though. :0)