More than 100 million Americans face threats from a multi-day severe weather system bringing dangerous conditions across large portions of the United States this week.

The San Francisco Bay Area is experiencing unusually warm temperatures, with forecasters predicting highs reaching into the 90s on Thursday. The elevated temperatures have prompted heat alerts and raised concerns about wildfire conditions in the region.

Meanwhile, severe storm threats have expanded across other parts of the country, with meteorologists monitoring conditions for tornadoes, hail storms, and damaging winds. Some areas are expected to see temperatures soaring into triple digits as part of the broader weather pattern.

The Northeast is preparing for heavy rainfall following the extreme heat, with forecasters predicting significant precipitation amounts. Prediction markets are showing a 94% probability of New York City receiving over one inch of rain by the end of the month.

The weather system represents a complex pattern affecting multiple regions simultaneously, combining heat advisories in some areas with severe storm watches and flood concerns in others. Meteorologists continue to monitor the evolving conditions as the multi-day event progresses.