Wednesday, July 2, 2008 | 5:02 p.m.
Heat five to 10 degrees above normal summer temperatures prompted the National Weather Service to issue an excessive heat warning from 11 a.m. to 8 p.m. Thursday.
Weather service forecasters say Las Vegas residents and visitors can expect high temperatures to reach 112 degrees, which is considered extreme heat for this time of year.
Those visiting Lakes Mead and Mojave or in Laughlin on Thursday can expect high temperatures from 115 degrees to 117 degrees, the weather service says.
The high today was 109 degrees, but the heat will increase as winds die down, the weather service says.
Breezes from 12 mph to 15 mph with gusts up to 21 mph were reported in the Las Vegas Valley today, shearing a degree or two off the high temperature mark.
On Thursday there will be little or no wind in the valley, allowing temperatures to rise accordingly, the weather service says.
For July 4th, the temperatures will stay hot at or near 110 degrees, but forecasters do not expect excessive heat for the start of the holiday weekend.