The U.S. is bracing for severe weather as approximately 195 million Americans will be affected by a heatwave and as a tropical storm may reach Florida by the weekend.

The National Weather Service declared an excessive heat watch for this week. Many big cities are seeing soaring temperatures.

The Pacific West Coast will again see temperatures reach triple digits. Parts of Washington State, western Oregon, and northern California are experiencing the worst of it. The heat is also fueling the massive Dixie Fire in northeast California.

Washington is forecasting temperatures to reach the lower 100s and with a possibility of reaching 109 degrees by Friday. Oregon and northern California are expected to see severe heat.

Temperatures will not be as severe as the late-June heatwave which killed hundreds in Western regions. The new heatwave has still prompted heat advisories.

The heat advisories Wednesday are in place for 34 states. The northeast faces high humidity, which will make temperatures in the 90s feel as hot as 110.

Amidst the heatwave, a tropical storm that formed Tuesday evening is heading towards southern Florida and it is expected to possibly hit shores by the weekend, the National Hurricane Center said Wednesday.

As of Wednesday at about 5 p.m. ET, Tropical Storm Fred is about 30 miles away from the west side of Santo Domingo, Dominican Republic, and has winds moving northwest at 45 mph.

"We will remain vigilant against the possibility of flash floods that may arise during the night and I reiterate that everyone take the recommended precautionary measures. If there are any unexpected changes, an announcement will be made early in the morning,” said Puerto Rico Gov. Pedro Pierluisi in a tweet Tuesday night.

According to AccuWeather forecasters, the system could strengthen to hurricane force once it moves into the eastern Gulf of Mexico.