A heat wave that is expected to bring triple-digit temperatures to parts of the southland has prompted state officials to issue a flex alert ahead of the hot weather. Wednesday is expected to be the hottest day of the week, according to the National Weather Service. Coastal areas could see temperatures between 85 to 92, while inland areas could reach 92 to 100. Triple digits to 110 are forecasted in local valleys and deserts, according to the weather service.