'Dangerously hot conditions': millions in US west prepare for extreme heatwave
Heat warnings are in effect across region as record-high temperatures are forecast in California, Nevada and Arizona

TL;DR
- Extreme heat is forecast for California, Nevada, and Arizona, with unprecedented temperatures expected.
- The National Weather Service (NWS) issued a heat advisory for California's Bay Area and central coast, with temperatures up to 90F (32C).
- Dozens of daily high temperature records are anticipated, along with the earliest 100-degree temperatures on record for March.
- This is the first time such a warning has been issued in March for the region, with temperatures 20F to 30F above average.
- Concerns are raised about increased heat-related illnesses, especially among vulnerable populations.
- Winter recreation has been affected, with at least one ski resort in central California closing early due to warm conditions.
- The heatwave could further diminish California's snowpack, which is already below average and a key water source.
- Record-breaking heat is also forecast for Las Vegas, Nevada, with temperatures expected in the mid-90s.
- An 'extreme heat warning' is in effect for much of Nevada and north-west Arizona, with expected temperatures between 95F and 103F.