Harmful S.F. Bay algal bloom bigger than expected and growing

Sometimes, water issues are best seen from the sky.

Thirsty riverbeds. Flooded neighborhoods. And this week, a harmful algal bloom overtaking San Francisco Bay.

That’s why David Houghton, a volunteer pilot with the environmental nonprofit LightHawk fired up the engine on his forest green 1979 Mooney M20K on Wednesday morning and pointed its small propeller skyward.

As soon as the plane bounced to 1,000 feet, there it was: long tendrils of rust-colored water, swirling under the San Mateo Bridge, creeping up to the shoreline near San Francisco Airport, hovering near Hayward, Foster City and Vallejo.

Harmful S.F. Bay algal bloom bigger than expected and growing