Sail Bay and Ski Beach Park waters have been glowing electric blue at night, though the show may disappear the following night.

San Diego will hit about 90 degrees Wednesday as extreme heat, dangerous surf and coastal flooding affect the region. Cooler weather and possible showers arrive this weekend.

San Diego will hit about 96 degrees Tuesday as an Extreme Heat Warning continues through Thursday. Cooler weather and possible showers arrive Sunday and Monday.

San Diego’s heat wave peaks near 99 degrees Monday, with an Extreme Heat Warning continuing through Thursday and beach hazards arriving Tuesday.

San Diego is headed for a sunny 97-degree Sunday as an Extreme Heat Warning stretches through Thursday. Cooler weather finally arrives Friday.

San Diego is headed for a 99-degree Saturday, a warm night and another near-100-degree day Sunday as an Extreme Heat Warning continues through Thursday.

Todd Gloria's proclamation comes as San Diego prepares for a potentially severe winter.

Patchy fog will give way to a 97-degree Friday in San Diego, with a 100-degree Saturday ahead. An Extreme Heat Warning remains in effect through Thursday.

Fog gives way to a sharp warmup in San Diego, with highs nearing 100 degrees and an Extreme Heat Warning starting Friday.

Crews are clearing storm drains and reinforcing infrastructure ahead of what forecasters call a potentially historic El Niño winter.

A coastal flood advisory lasts through Wednesday afternoon as San Diego prepares for a long stretch of dangerous heat beginning Friday.

San Diego sees patchy morning clouds Tuesday before a weekend heat surge. Coastal flooding remains a concern through Wednesday, while strong rip currents remain a concern through Tuesday.

Clouds clear Monday, but coastal flooding remains a concern through Wednesday, while dangerous rip currents remain a concern through Tuesday. Then San Diego heats up toward a 90-degree weekend.