The NWS urges people to take precautions to prevent experiencing heat-related ilnesses. Though high temperatures will range from the low- to mid-90s and are normal for this time of year, increased humidity will create heat index levels that will make the days feel hotter, said Kole Fehling, meteorologist with the National Weather Service in Melbourne. "The heat index for the three-day weekend will be between 100 and 105, with Sunday expected to be the hottest," Fehling said. The heat index combines air temperature and relative humidity, in shaded areas, to get a perceived equivalent temperature. The forecast for Friday calls for mostly sunny skies with a high near 92 but it will feel like 101 degrees, according to the NWS.