California is at risk of experiencing a dangerous heat wave that could last up to two weeks, according to the National Weather Service (NWS). The Climate Prediction Center has called for an increased chance of above-average temperatures across the state, with triple-digit temperatures expected in the deserts of Mexico and slowly creeping into the southwestern United States. The heat wave is expected to begin on Monday, pushing temperatures into the 90s and 100s in inland San Diego County. An excessive heat watch will be in effect from Tuesday to Sunday, with temperatures possibly reaching 116 degrees in some areas. The heat wave, which is caused by a high-pressure system centered over Arizona and New Mexico, poses an increased risk of wildfires in the mountains and desert communities. California has already experienced hotter-than-average temperatures this year, and the heat wave could last even longer, possibly up to two weeks. Motorists are advised to travel with plenty of water and to check their vehicle's air conditioning systems. The heat wave comes amid rising concerns about climate change, with the global average temperature on Monday being the highest on record.