In hot, dry weather, care is needed to successfully germinate carrots. Once they begin to germinate, they don't tolerate drying out. Also, the sun can bake a hard crust on the surface of some soils. To avoid these problems, the soil should be kept continually moist. It may be necessary to water several times a day.
Some gardeners use a light covering of peat moss to retain moisture.
In my garden, I have setup sprinklers on a timer to gently water the seedbed four times a day. This has given good results in the past. As soon as the seedlings begin to emerge I will cover them with Summer Insect Barrier, a lightweight woven material that keeps pests out without raising soil temperature. It was very exciting to have the website and garden featured on the cover of the Home and Garden section of the TriCity Herald. It has been equally exciting to hear from so many gardeners in our area who found out about the website from the newspaper article.