More than 125 million people across the United States face risks from severe weather Tuesday as forecasters issued tornado watches throughout the Central U.S. and Hawaii officials dealt with the aftermath of a powerful storm system.

The National Weather Service warned of a multiday outbreak of severe storms affecting the central United States, with tornado watches covering multiple states in the region. The weather system has already produced tornadoes that caused devastation across parts of the Midwest.

Meanwhile, Hawaii health officials issued brown water advisories across all major islands including Kaua'i, O'ahu, Maui and the Big Island following heavy rainfall from a Kona Low storm system. The advisories warn residents and visitors to avoid entering ocean waters that may be contaminated with runoff from the recent downpours.

The severe weather outbreak represents a significant threat to millions of Americans from coast to coast, with meteorologists tracking multiple storm systems simultaneously. Emergency management officials in affected areas have urged residents to monitor weather alerts and have emergency plans ready.

The timing of the severe weather comes during a period when much of the country remains vulnerable to rapid weather changes, with forecasters continuing to monitor conditions for potential additional severe weather development in the coming days.