This week's triple-digit heat wave could be the Bay Area's hottest in years

Brace yourself — we're due this week for what meteorologists are saying could be the hottest weather in years.

Why it matters: Heat waves increase the risk of heat stroke and other related illnesses, especially among children, pets and people who lack effective cooling and/or adequate hydration.

Driving the news: While San Francisco itself is forecast to see temperatures near 90 degrees, more inland parts of the Bay could see at least four consecutive days of 100-degree weather.

• Temperatures could even rise to nearly 110 degrees in North and East Bay.
• Wednesday will be the hottest day this week, with high temperatures up to 25 degrees above normal throughout the region, the San Francisco Chronicle reports .

What to watch: PG&E has warned that shut-offs are likely in some counties on Tuesday, including Napa and Solano, due to concern over high winds that could cause trees or debris to damage equipment.

• Nearly 12,000 customers will be impacted.
• The utility company is asking everyone to shift or reduce their electricity usage from 4 to 9pm to help offset demand.

Threat level: Extreme heat often causes people's body temperature to rise faster than it can cool down, leading to potential damage to the brain and other vital organs.

• Around 1,220 people in the U.S. are killed by extreme heat every year, according to the CDC.
• Take advantage of cooling centers at San Francisco's public libraries and seek care if you develop a throbbing headache, dizziness or nausea.

Sign up for Axios San Francisco for free.