Heat Wave

A statewide Flex Alert is one of the steps the operator of California’s power grid can take to avoid unplanned power outages in extreme heat.

After grueling heat and humidity on Wednesday disrupted multiple tennis matches and caused one player to have heatstroke, the International Tennis Federation announced it was rescheduling future tennis matches to begin later in the day.

The city of Berkeley recommends residents of the Berkeley Hills to prepare for high fire danger as a Red Flag Warning will go in effect at 5 p.m.

A rapidly growing wildfire south of Lake Tahoe forced the evacuation of a mountain town and the cancellation of an extreme bike ride through the Sierra Nevada, leaving thousands of riders and spectators stranded Saturday and rushing to flee the area.

With hotter, drier temperatures and an anticipated increase in wildfires, the Bay Area is bound to have some unhealthy air quality this summer. Here are some ways to prepare and keep yourself safe.

The National Oceanic and Atmospheric Administration says as Earth continues to warm we are seeing heat that will become more frequent and intense as climate change drives warmer temperatures overall. Meteorologist Kari Hall reports.

The National Oceanic and Atmospheric Administration says as Earth continues to warm we are seeing heat that will become more frequent and intense as climate change drives warmer temperatures overall.

Cal ISO issues alert for 4-9 p.m. Monday to ease potential strain on power grid.

The California Independent System Operator (ISO) has issued a statewide Flex Alert for Monday, July 12.

Firefighters working in searing heat struggled to contain the largest wildfire in California this year while state power operators urged people to conserve energy after a huge wildfire in neighboring Oregon disrupted the flow of electricity from three major transmission lines

Triple digit temperatures across the Bay Area sent people searching for an air conditioner and shade.

California residents are asked to cut down their energy use as the state-wide power grid is under strenuous conditions from excessive heat and the growing wildfire in Oregon.

Triple digit temperatures across the Bay Area sent people searching for an air conditioner and shade. Marianne Favro and Rob Mayeda report.

Some states in the Pacific Northwest announced emergency rules that provide farmworkers and others who work outdoors more protection from hot weather in the wake of an extreme heat wave.

Calistoga will open a cooling center this weekend to help residents get relief from the heat.

With a statewide Flex Alert in effect, residents are keeping themselves and their homes cool with some simple adjustments to conserve energy — but others admit they’re just cranking up the AC anyway.

The heat is on and it’s turned all the way up in parts of the Bay Area where it’s over 105 degrees. Thom Jensen reports.

Parts of the Bay Area are in for a scorching weekend.

Meteorologist Kari Hall has a look at where temperatures will reach over 100 degrees this weekend in the Microclimate Forecast.

Meteorologist Kari Hall has a look at where temperatures will reach over 100 this weekend in the Microclimate Forecast.